MESON Chess Problem Database
Problem Display
PID: 867 (8/2p5/2K5/8/1p1Q4/kp6/p7/3B4 w - - 0 1)
McDowell, Michael
British Chess Magazine, 1992
#2
3 + 5
SOLUTION
- SOUND
- Sets
- 1...Ka4
- 2.Qa7#
- 1...a1Q
- 2.Qxa1#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...a1R
- 2.Qxa1#
- 1...b2
- 2.Qa7#
- 1...Ka4
- Tries
- 1.Kc5?
- 1...Ka4
- 2.Qxb4#
- 1...a1Q
- 2.Qxa1#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...a1R
- 2.Qxa1#
- 1...b2
- 2.Qxb4#
- 1...c6!
- 1...Ka4
- 1.Kxc7?
- 1...a1Q
- 2.Qxa1#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...a1R
- 2.Qxa1#
- 1...b2
- 2.Qa7#
- 1...Ka4!
- 1...a1Q
- 1.Bc2?
- 1...Ka4
- 2.Qa7#
- 1...a1Q
- 2.Qxa1#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...a1R
- 2.Qxa1#
- 1...b2
- 2.Qa7#
- 1...bxc2!
- 1...Ka4
- 1.Be2?
- 1...Ka4
- 2.Qa7#
- 1...a1Q
- 2.Qxa1#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...a1R
- 2.Qxa1#
- 1...b2!
- 1...Ka4
- 1.Bf3?
- 1...Ka4
- 2.Qa7#
- 1...a1Q
- 2.Qxa1#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...a1R
- 2.Qxa1#
- 1...b2!
- 1...Ka4
- 1.Bg4?
- 1...Ka4
- 2.Qa7#
- 1...a1Q
- 2.Qxa1#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...a1R
- 2.Qxa1#
- 1...b2!
- 1...Ka4
- 1.Bh5?
- 1...Ka4
- 2.Qa7#
- 1...a1Q
- 2.Qxa1#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...a1R
- 2.Qxa1#
- 1...b2!
- 1...Ka4
- 1.Qa1?
- 1...Ka4
- 2.Qxa2#
- 1...b2!
- 1...Ka4
- 1.Qb2+?
- 1...Ka4
- 2.Qxa2#
- 1...Kxb2!
- 1...Ka4
- 1.Qe5?
- 1...a1Q
- 2.Qxa1#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...a1R
- 2.Qxa1#
- 1...b2
- 2.Qa5#
- 1...Ka4!
- 1...a1Q
- 1.Kc5?
- Keys
- 1.Qh8!
- 1...Ka4
- 2.Qa8#
- 1...a1Q
- 2.Qxa1#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...a1R
- 2.Qxa1#
- 1...b2
- 2.Qa8#
- 1...Ka4
- 1.Qh8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- K(b);P-FLIGHT,P_SPINP(c)::QAR(B)
- P(a);OGATEB::QAR2(B),XQ(a)
- P(a);OGATEB::QAR2(B),XS(a)
- P(a);OGATEB::QAR2(B),XB(a)
- P(a);OGATEB::QAR2(B),XR(a)
- P(c);SBLOCK::QAR(B)
- Tries
- Try
- K(C);P-FLIGHT
- Vars
- K(b);P-FLIGHT,P_SPINP(c)::QAR1(B),XP(d)
- P(a);OGATEB::QAR2(B),XQ(a)
- P(a);OGATEB::QAR2(B),XS(a)
- P(a);OGATEB::QAR2(B),XB(a)
- P(a);OGATEB::QAR2(B),XR(a)
- P(c);::QAB1(B),XP(d)
- Refutation
- P(e);
- Try
- K(C);P-FLIGHT,XP(e)
- Vars
- P(a);OGATEB::QAR2(B),XQ(a)
- P(a);OGATEB::QAR2(B),XS(a)
- P(a);OGATEB::QAR2(B),XB(a)
- P(a);OGATEB::QAR2(B),XR(a)
- P(c);SBLOCK::QAR(B)
- Refutation
- K(b);P-FLIGHT,P_SPINP(c)
- Try
- B(A);
- Vars
- K(b);P-FLIGHT,P_SPINP(c)::QAR(B)
- P(a);OGATEB::QAR2(B),XQ(a)
- P(a);OGATEB::QAR2(B),XS(a)
- P(a);OGATEB::QAR2(B),XB(a)
- P(a);OGATEB::QAR2(B),XR(a)
- P(c);SBLOCK::QAR(B)
- Refutation
- P(c);XB(A)
- Try
- B(A);
- Vars
- K(b);P-FLIGHT,P_SPINP(d)::QAR(B)
- P(a);OGATEB::QAR2(B),XQ(a)
- P(a);OGATEB::QAR2(B),XS(a)
- P(a);OGATEB::QAR2(B),XB(a)
- P(a);OGATEB::QAR2(B),XR(a)
- Refutation
- P(c);
- Try
- B(A);
- Vars
- K(b);P-FLIGHT,P_SPINP(d)::QAR(B)
- P(a);OGATEB::QAR2(B),XQ(a)
- P(a);OGATEB::QAR2(B),XS(a)
- P(a);OGATEB::QAR2(B),XB(a)
- P(a);OGATEB::QAR2(B),XR(a)
- Refutation
- P(c);
- Try
- B(A);
- Vars
- K(b);P-FLIGHT,P_SPINP(d)::QAR(B)
- P(a);OGATEB::QAR2(B),XQ(a)
- P(a);OGATEB::QAR2(B),XS(a)
- P(a);OGATEB::QAR2(B),XB(a)
- P(a);OGATEB::QAR2(B),XR(a)
- Refutation
- P(c);
- Try
- B(A);
- Vars
- K(b);P-FLIGHT,P_SPINP(d)::QAR(B)
- P(a);OGATEB::QAR2(B),XQ(a)
- P(a);OGATEB::QAR2(B),XS(a)
- P(a);OGATEB::QAR2(B),XB(a)
- P(a);OGATEB::QAR2(B),XR(a)
- Refutation
- P(c);
- Try
- Q(B);P_PINP(a)
- Vars
- K(b);P-FLIGHT::QAR2(B),XP(a)
- Refutation
- P(c);
- Try
- Q(B);CHECK
- Vars
- K(b);P-FLIGHT,P_SPINP(c)::QAR2(B),XP(a)
- Refutation
- K(b);S_FLIGHT,XQ(B)
- Try
- Q(B);
- Vars
- P(a);OGATEB::QAR2(B),XQ(a)
- P(a);OGATEB::QAR2(B),XS(a)
- P(a);OGATEB::QAR2(B),XB(a)
- P(a);OGATEB::QAR2(B),XR(a)
- P(c);SBLOCK::QAR2(B)
- Refutation
- K(b);P-FLIGHT,P_SPINP(c)
- Try
- Actual
- Q(B);
- Vars
- K(b);P-FLIGHT,P_SPINP(c)::QAR(B)
- P(a);OGATEB::QAR2(B),XQ(a)
- P(a);OGATEB::QAR2(B),XS(a)
- P(a);OGATEB::QAR2(B),XB(a)
- P(a);OGATEB::QAR2(B),XR(a)
- P(c);SBLOCK::QAR(B)
Developed and maintained by Brian Stephenson.
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