MESON Chess Problem Database
Problem Display
PID: 11975 (5B2/q4N2/2p1Pr2/3k1P1R/3p4/1bPQ1N1B/3P1K2/8 w - - 0 1)
Fabel, Karl
The Problemist, 1973
#2
11 + 6
SOLUTION
- SOUND
- Sets
- 1...Qb8
- 2.Qxd4#
- 1...Qa1
- 2.Qxd4#
- 1...Qa2
- 2.Qxd4#
- 1...Qa3
- 2.Qxd4#
- 1...Qa5
- 2.Qxd4#
- 1...Qa6
- 2.Qxd4#
- 1...Qb7
- 2.Qxd4#
- 1...Qc7
- 2.Qxd4#
- 1...Qd7
- 2.Qxd4#
- 1...Qe7
- 2.Qxd4#
- 1...Qxf7
- 2.Qxd4#
- 1...Qa8
- 2.Qxd4#
- 1...Rxe6
- 2.fxe6#
- 1...Rg6
- 2.fxg6#
- 1...Rxf7
- 2.f6#
- 1...Bd1
- 2.c4#
- 1...Bc2
- 2.c4#
- 1...Ba4
- 2.c4#
- 1...Qb8
- Tries
- 1.Se1?
- threat
- 2.Bg2#
- 1...Qxf7
- 2.Qxd4#
- 1...Rxe6
- 2.fxe6#
- 1...Rxf7
- 2.f6#
- 1...Qe7
- 2.Qxd4#
- 1...Rg6
- 2.fxg6#
- 1...Bd1
- 2.c4#
- 1...Rxf5+!
- threat
- 1.Sg1?
- threat
- 2.Bg2#
- 1...Qxf7
- 2.Qxd4#
- 1...Rxe6
- 2.fxe6#
- 1...Rxf7
- 2.f6#
- 1...Qe7
- 2.Qxd4#
- 1...Rg6
- 2.fxg6#
- 1...Bd1
- 2.c4#
- 1...Rxf5+!
- threat
- 1.Sh2?
- threat
- 2.Bg2#
- 1...Qxf7
- 2.Qxd4#
- 1...Rxe6
- 2.fxe6#
- 1...Rxf7
- 2.f6#
- 1...Qe7
- 2.Qxd4#
- 1...Rg6
- 2.fxg6#
- 1...Bd1
- 2.c4#
- 1...Rxf5+!
- threat
- 1.Sh4?
- threat
- 2.Bg2#
- 1...Qxf7
- 2.Qxd4#
- 1...Rxe6
- 2.fxe6#
- 1...Rxf7
- 2.f6#
- 1...Qe7
- 2.Qxd4#
- 1...Rg6
- 2.fxg6#
- 1...Bd1
- 2.c4#
- 1...Rxf5+!
- threat
- 1.Qe4+?
- 1...Kc4
- 2.Bf1#
- 1...Kxe4!
- 1...Kc4
- 1.Se1?
- Keys
- 1.Sxd4!
- threat
- 2.Bg2#
- 1...Qxd4+
- 2.Qxd4#
- 1...Rxf5+
- 2.Rxf5#
- 1...Qxf7
- 2.Sf3#
- 1...Rxe6
- 2.fxe6#
- 1...Rxf7
- 2.f6#
- 1...Qe7
- 2.Sxb3#
- 1...Rg6
- 2.fxg6#
- 1...Bd1
- 2.c4#
- threat
- 1.Sxd4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 12
- Sets
- Q(f);N_GUARD::QAR1(D),XP(b)
- Q(f);N_GUARD,P_PINP(A)::QAR1(D),XP(b)
- Q(f);N_GUARD,XS(J)::QAR1(D),XP(b)
- R(e);OGATE,XP(I)::R(H)+P(G),XR(e)
- R(e);OGATE::R(H)+P(G),XR(e)
- R(e);OGATE,XS(J)::R(H)+P(G)
- B(a);N_GUARD::P(C)
- Tries
- Try
- S(E);P_SPINP(G)
- Threat
- B(F)
- Vars
- Q(f);N_GUARD,XS(J)::QAR1(D),XP(b)
- R(e);N_PINP(G),XP(I)::R(H)+P(G),XR(e)
- R(e);XS(J)::R(H)+P(G)
- Q(f);N_GUARD::QAR1(D),XP(b)
- R(e);N_PINP(G)::R(H)+P(G),XR(e)
- B(a);N_GUARD::P(C)
- Refutation
- R(e);CHECK,P_SPINR(e),XP(G)
- Try
- S(E);P_SPINP(G)
- Threat
- B(F)
- Vars
- Q(f);N_GUARD,XS(J)::QAR1(D),XP(b)
- R(e);N_PINP(G),XP(I)::R(H)+P(G),XR(e)
- R(e);XS(J)::R(H)+P(G)
- Q(f);N_GUARD::QAR1(D),XP(b)
- R(e);N_PINP(G)::R(H)+P(G),XR(e)
- B(a);N_GUARD::P(C)
- Refutation
- R(e);CHECK,P_SPINR(e),XP(G)
- Try
- S(E);P_SPINP(G)
- Threat
- B(F)
- Vars
- Q(f);N_GUARD,XS(J)::QAR1(D),XP(b)
- R(e);N_PINP(G),XP(I)::R(H)+P(G),XR(e)
- R(e);XS(J)::R(H)+P(G)
- Q(f);N_GUARD::QAR1(D),XP(b)
- R(e);N_PINP(G)::R(H)+P(G),XR(e)
- B(a);N_GUARD::P(C)
- Refutation
- R(e);CHECK,P_SPINR(e),XP(G)
- Try
- S(E);P_SPINP(G)
- Threat
- B(F)
- Vars
- Q(f);N_GUARD,XS(J)::QAR1(D),XP(b)
- R(e);N_PINP(G),XP(I)::R(H)+P(G),XR(e)
- R(e);XS(J)::R(H)+P(G)
- Q(f);N_GUARD::QAR1(D),XP(b)
- R(e);N_PINP(G)::R(H)+P(G),XR(e)
- B(a);N_GUARD::P(C)
- Refutation
- R(e);CHECK,P_SPINR(e),XP(G)
- Try
- Q(D);CHECK,N_PINP(b)
- Vars
- K(c);P_SPINP(b),S_FLIGHT::B(F)
- Refutation
- K(c);S_FLIGHT,XQ(D)
- Try
- Actual
- S(E);P_SPINP(G),P_SPINS(E),XP(b)
- Threat
- B(F)
- Vars
- Q(f);CHECK,OGATE,P_SPINQ(f),XS(E)::QAR1(D),XQ(f)
- R(e);CHECK,OGATE,P_SPINR(e),XP(G)::R(H),XR(e)
- Q(f);N_PINS(E),XS(J)::QAR(D)+S(E)
- R(e);N_PINP(G),XP(I)::R(H)+P(G),XR(e)
- R(e);XS(J)::R(H)+P(G)
- Q(f);N_PINS(E)::QAR(D)+S(E),XB(a)
- R(e);N_PINP(G)::R(H)+P(G),XR(e)
- B(a);N_GUARD::P(C)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
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