Tuesday, July 25, 2006
Tasc Chess Tutor Errata
First I would like to say thanks to Sancho and Tempo for recommending this program. It was much more of what I needed to study. It does have a few quirks, like occasionally throwing in weak defensive moves for you to feast on. I think it would be better to have 10% more defense problems, and some very basic variation quizzes. The most maddening part was the occasionally mistake of theirs, and a list of them follows.
Analysis by Crafty 19.01 and Fritz 8
Step 2, exercise 8b, #2: 1. f4 is better but marked incorrect. 1. Qa3 is met by this:
1...Rfxf2 2.Nf7+ Kg8 3.Qf8+ Kxf8 4.Nxg5 Rxf1+ 5.Rxf1+ Nf5 6.a5 Ra2 7.Ne6+ Ke7 8.Re1 Rxa5 9.Kf2
Step 2, exercise 12h, #10 NOTE: 1... Ne3 is best but it is certainly not mate:
1... Ne3 2. Bf4! Rxf4 3. Rg1+ Kf8 4. Qxd5 Nxd5
------------------------------------------------------------------
Step 3, exercise 10d, #5: 1. Rg5+, 1. Rg4+, and 1. Rg3+ are equal but marked incorrect
Step 3, exercise 17f, #9: 2. Qf8# is equal but marked incorrect
------------------------------------------------------------------
Step 4, exercise 3d, #2: 1. Qc4+ and 1. h3 are better but marked incorrect
1. +- (9.70): 1.h3 Qg6 2.Nh4 Qe8 3.Nf5 Nc5 4.Qd6 Rxd6 5.Nxd6+ Kd7 6.Nxe8 Kxe8
2. +- (9.20): 1.Qf7 Bc5 2.Bd5 Rf8 3.Bxb7+ Kd8 4.Qc4 Ke7 5.Rfd1 Rd8
3. +- (8.55): 1.Qc4+ Kb8 2.Qb4 Rc8 3.a5
4. +- (7.96): 1.Rxb6 Nxb6 2.Qc5+ Kb8 3.Qxb6 Qd7 4.Bd5 Qc7 5.Rb1 Qxb6 6.Rxb6 Rd7 7.a5
Step 4, exercise 7b, #4 NOTE: 1. Re8 Ra8!! draws
1. = (0.00): 2...h2 3.Rh8+ Nh7 4.Rg8 Ng5 5.Rh8+
2. = (0.00): 2...Kh7 3.Ra7+ Kh6
Step 4, exercise 14a, #5: 1. Rab2 is worse but marked as correct (it draws)
Step 4, exercise 16e, #5: 1. Nxc4 is equal but marked incorrect,
also 1. Ne5 is almost equal but marked incorrect
1. (-0.79): 1...Rxf3 2.Qxf3 Ne5 3.Bxe6+ Bxe6 4.Qg3 Rf8 5.Red1 h6 6.Bf4
2. (-0.79): 1...Nxc4 2.Qxc4 Rxf3 3.hxg4 Rf7 4.Qd3 Bd7 5.Be3 Be5 6.g5 Bc6 7.Red1
3. (-0.65): 1...Ne5 2.Nxe5 Bxe5 3.Rf1 Nxc4 4.Qxc4 b5 5.Qd3 c4 6.Qe3 b4 7.f4
------------------------------------------------------------------
Step 5, exercise 2c, #8: 2. Nce6+ is equal but is marked incorrect
Step 5, exercise 3a, #6: 1. a5 draws but is marked incorrect
Step 5, exercise 5b, #5: 1...Ka3 draws but is marked incorrect
Step 5, exercise 6a, #5: 2. c5 is better but is marked incorrect
Step 5, exercise 7a, #10: 1... d5 is slightly better but marked it as incorrect.
Step 5, exercise 7b, #7: deep computer analysis marks Nf3+ as best:
1. -+ (-3.33): 1...Nf3+ 2.Bxf3 Be5+ 3.Kg2 Qxe3 4.Qxg8+ Kxg8 5.Bxa8 Bd4 6.Kh2+ Kf8 7.Rgf1 Qe5+ 8.Rf4 Be3 9.Kg3 Bxf4+ 10.Rxf4
2. -+ (-2.93): 1...Ng4+ 2.hxg4 Be5+ 3.Kh3 Rxg5 4.Bxg5 Qxc2 5.Rgf1 f6 6.Bh6 Qxa2 7.Bf3 Qb3 8.Bf8
Step 5, exercise 7c, #10: 2... Ncxd4 is better but is marked incorrect (gets an additional pawn)
Step 5, exercise 9a, #9: 3. Rb8 is equal but marked incorrect
Step 5, exercise 9b, #5: 1. Rc7+ is equal but marked incorrect
Step 5, exercise 11c, #6: 4. Qh7# is equal but marked incorrect
Step 5, exercise 17e, #2: 1. Nh5 is equal but marked incorrect,
also 1.f6 exf6 Nh5 is equal but marked incorrect
Step 5, exercise 17e, #9: 1. Ne3 is better but marked "not bad"
Step 2, exercise 8b, #2: 1. f4 is better but marked incorrect. 1. Qa3 is met by this:
1...Rfxf2 2.Nf7+ Kg8 3.Qf8+ Kxf8 4.Nxg5 Rxf1+ 5.Rxf1+ Nf5 6.a5 Ra2 7.Ne6+ Ke7 8.Re1 Rxa5 9.Kf2
Step 2, exercise 12h, #10 NOTE: 1... Ne3 is best but it is certainly not mate:
1... Ne3 2. Bf4! Rxf4 3. Rg1+ Kf8 4. Qxd5 Nxd5
------------------------------------------------------------------
Step 3, exercise 10d, #5: 1. Rg5+, 1. Rg4+, and 1. Rg3+ are equal but marked incorrect
Step 3, exercise 17f, #9: 2. Qf8# is equal but marked incorrect
------------------------------------------------------------------
Step 4, exercise 3d, #2: 1. Qc4+ and 1. h3 are better but marked incorrect
1. +- (9.70): 1.h3 Qg6 2.Nh4 Qe8 3.Nf5 Nc5 4.Qd6 Rxd6 5.Nxd6+ Kd7 6.Nxe8 Kxe8
2. +- (9.20): 1.Qf7 Bc5 2.Bd5 Rf8 3.Bxb7+ Kd8 4.Qc4 Ke7 5.Rfd1 Rd8
3. +- (8.55): 1.Qc4+ Kb8 2.Qb4 Rc8 3.a5
4. +- (7.96): 1.Rxb6 Nxb6 2.Qc5+ Kb8 3.Qxb6 Qd7 4.Bd5 Qc7 5.Rb1 Qxb6 6.Rxb6 Rd7 7.a5
Step 4, exercise 7b, #4 NOTE: 1. Re8 Ra8!! draws
1. = (0.00): 2...h2 3.Rh8+ Nh7 4.Rg8 Ng5 5.Rh8+
2. = (0.00): 2...Kh7 3.Ra7+ Kh6
Step 4, exercise 14a, #5: 1. Rab2 is worse but marked as correct (it draws)
Step 4, exercise 16e, #5: 1. Nxc4 is equal but marked incorrect,
also 1. Ne5 is almost equal but marked incorrect
1. (-0.79): 1...Rxf3 2.Qxf3 Ne5 3.Bxe6+ Bxe6 4.Qg3 Rf8 5.Red1 h6 6.Bf4
2. (-0.79): 1...Nxc4 2.Qxc4 Rxf3 3.hxg4 Rf7 4.Qd3 Bd7 5.Be3 Be5 6.g5 Bc6 7.Red1
3. (-0.65): 1...Ne5 2.Nxe5 Bxe5 3.Rf1 Nxc4 4.Qxc4 b5 5.Qd3 c4 6.Qe3 b4 7.f4
------------------------------------------------------------------
Step 5, exercise 2c, #8: 2. Nce6+ is equal but is marked incorrect
Step 5, exercise 3a, #6: 1. a5 draws but is marked incorrect
Step 5, exercise 5b, #5: 1...Ka3 draws but is marked incorrect
Step 5, exercise 6a, #5: 2. c5 is better but is marked incorrect
Step 5, exercise 7a, #10: 1... d5 is slightly better but marked it as incorrect.
Step 5, exercise 7b, #7: deep computer analysis marks Nf3+ as best:
1. -+ (-3.33): 1...Nf3+ 2.Bxf3 Be5+ 3.Kg2 Qxe3 4.Qxg8+ Kxg8 5.Bxa8 Bd4 6.Kh2+ Kf8 7.Rgf1 Qe5+ 8.Rf4 Be3 9.Kg3 Bxf4+ 10.Rxf4
2. -+ (-2.93): 1...Ng4+ 2.hxg4 Be5+ 3.Kh3 Rxg5 4.Bxg5 Qxc2 5.Rgf1 f6 6.Bh6 Qxa2 7.Bf3 Qb3 8.Bf8
Step 5, exercise 7c, #10: 2... Ncxd4 is better but is marked incorrect (gets an additional pawn)
Step 5, exercise 9a, #9: 3. Rb8 is equal but marked incorrect
Step 5, exercise 9b, #5: 1. Rc7+ is equal but marked incorrect
Step 5, exercise 11c, #6: 4. Qh7# is equal but marked incorrect
Step 5, exercise 17e, #2: 1. Nh5 is equal but marked incorrect,
also 1.f6 exf6 Nh5 is equal but marked incorrect
Step 5, exercise 17e, #9: 1. Ne3 is better but marked "not bad"
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A great resource! Hopefully people will add to it as time goes on. I remember a couple of mistakes (mates that didn't count), but don't think I wrote them down...
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