MESON Chess Problem Database
Problem Display
PID: 701 (8/8/8/6pq/3Q2nk/2R3br/5PP1/K2B4 w - - 0 1)
Allen, Frederick B
British Chess Magazine, 1938
#2
6 + 6
| 5454 | Near Snap | 2007 |
SOLUTION
- SOUND
- Sets
- 1...Qg6
- 2.Qxg4#
- 1...Qf7
- 2.Qxg4#
- 1...Qe8
- 2.Qxg4#
- 1...Qh6
- 2.Qxg4#
- 1...Qh7
- 2.Qxg4#
- 1...Qh8
- 2.Qxg4#
- 1...Rh1
- 2.fxg3#
- 1...Rh2
- 2.fxg3#
- 1...Bxf2
- 2.Rxh3#
- 1...Bh2
- 2.Rxh3#
- 1...Bf4
- 2.Rxh3#
- 1...Be5
- 2.Rxh3#
- 1...Bd6
- 2.Rxh3#
- 1...Bc7
- 2.Rxh3#
- 1...Bb8
- 2.Rxh3#
- 1...Qg6
- Tries
- 1.Ka2?
- 1...Bxf2
- 2.Rxh3#
- 1...Qg6
- 2.Qxg4#
- 1...Qe8
- 2.Qxg4#
- 1...Qh6
- 2.Qxg4#
- 1...Qh7
- 2.Qxg4#
- 1...Qh8
- 2.Qxg4#
- 1...Rh1
- 2.fxg3#
- 1...Rh2
- 2.fxg3#
- 1...Bh2
- 2.Rxh3#
- 1...Bf4
- 2.Rxh3#
- 1...Be5
- 2.Rxh3#
- 1...Bd6
- 2.Rxh3#
- 1...Bc7
- 2.Rxh3#
- 1...Bb8
- 2.Rxh3#
- 1...Qf7+!
- 1...Bxf2
- 1.Be2?
- 1...Bxf2
- 2.Rxh3#
- 1...Qg6
- 2.Qxg4#
- 1...Qf7
- 2.Qxg4#
- 1...Qe8
- 2.Qxg4#
- 1...Qh6
- 2.Qxg4#
- 1...Qh7
- 2.Qxg4#
- 1...Qh8
- 2.Qxg4#
- 1...Rh2
- 2.fxg3#
- 1...Bh2
- 2.Rxh3#
- 1...Bf4
- 2.Rxh3#
- 1...Be5
- 2.Rxh3#
- 1...Bd6
- 2.Rxh3#
- 1...Bc7
- 2.Rxh3#
- 1...Bb8
- 2.Rxh3#
- 1...Rh1+!
- 1...Bxf2
- 1.Ra3?
- 1...Bxf2
- 2.Rxh3#
- 1...Qg6
- 2.Qxg4#
- 1...Qf7
- 2.Qxg4#
- 1...Qe8
- 2.Qxg4#
- 1...Qh6
- 2.Qxg4#
- 1...Qh7
- 2.Qxg4#
- 1...Rh1
- 2.fxg3#
- 1...Rh2
- 2.fxg3#
- 1...Bh2
- 2.Rxh3#
- 1...Bf4
- 2.Rxh3#
- 1...Be5
- 2.Rxh3#
- 1...Bd6
- 2.Rxh3#
- 1...Bc7
- 2.Rxh3#
- 1...Bb8
- 2.Rxh3#
- 1...Qh8!
- 1...Bxf2
- 1.Rb3?
- 1...Bxf2
- 2.Rxh3#
- 1...Qg6
- 2.Qxg4#
- 1...Qf7
- 2.Qxg4#
- 1...Qe8
- 2.Qxg4#
- 1...Qh6
- 2.Qxg4#
- 1...Qh7
- 2.Qxg4#
- 1...Rh1
- 2.fxg3#
- 1...Rh2
- 2.fxg3#
- 1...Bh2
- 2.Rxh3#
- 1...Bf4
- 2.Rxh3#
- 1...Be5
- 2.Rxh3#
- 1...Bd6
- 2.Rxh3#
- 1...Bc7
- 2.Rxh3#
- 1...Bb8
- 2.Rxh3#
- 1...Qh8!
- 1...Bxf2
- 1.Rd3?
- 1...Bxf2
- 2.Rxh3#
- 1...Qg6
- 2.Qxg4#
- 1...Qf7
- 2.Qxg4#
- 1...Qe8
- 2.Qxg4#
- 1...Qh6
- 2.Qxg4#
- 1...Qh7
- 2.Qxg4#
- 1...Rh1
- 2.fxg3#
- 1...Rh2
- 2.fxg3#
- 1...Bh2
- 2.Rxh3#
- 1...Bf4
- 2.Rxh3#
- 1...Be5
- 2.Rxh3#
- 1...Bd6
- 2.Rxh3#
- 1...Bc7
- 2.Rxh3#
- 1...Bb8
- 2.Rxh3#
- 1...Qh8!
- 1...Bxf2
- 1.Re3?
- 1...Bxf2
- 2.Rxh3#
- 1...Qg6
- 2.Qxg4#
- 1...Qf7
- 2.Qxg4#
- 1...Qe8
- 2.Qxg4#
- 1...Qh6
- 2.Qxg4#
- 1...Qh7
- 2.Qxg4#
- 1...Rh1
- 2.fxg3#
- 1...Rh2
- 2.fxg3#
- 1...Bh2
- 2.Rxh3#
- 1...Bf4
- 2.Rxh3#
- 1...Be5
- 2.Rxh3#
- 1...Bd6
- 2.Rxh3#
- 1...Bc7
- 2.Rxh3#
- 1...Bb8
- 2.Rxh3#
- 1...Qh8!
- 1...Bxf2
- 1.Qa4?
- 1...Bxf2
- 2.Rxh3#
- 1...Qg6
- 2.Qxg4#
- 1...Qf7
- 2.Qxg4#
- 1...Qe8
- 2.Qxg4#
- 1...Qh6
- 2.Qxg4#
- 1...Qh7
- 2.Qxg4#
- 1...Qh8
- 2.Qxg4#
- 1...Rh1
- 2.fxg3#
- 1...Rh2
- 2.fxg3#
- 1...Bh2
- 2.Rxh3#
- 1...Bf4
- 2.Rxh3#
- 1...Bd6
- 2.Rxh3#
- 1...Bc7
- 2.Rxh3#
- 1...Bb8
- 2.Rxh3#
- 1...Be5!
- 1...Bxf2
- 1.Qb4?
- 1...Bxf2
- 2.Rxh3#
- 1...Qg6
- 2.Qxg4#
- 1...Qf7
- 2.Qxg4#
- 1...Qe8
- 2.Qxg4#
- 1...Qh6
- 2.Qxg4#
- 1...Qh7
- 2.Qxg4#
- 1...Qh8
- 2.Qxg4#
- 1...Rh1
- 2.fxg3#
- 1...Rh2
- 2.fxg3#
- 1...Bh2
- 2.Rxh3#
- 1...Bf4
- 2.Rxh3#
- 1...Bd6
- 2.Rxh3#
- 1...Bc7
- 2.Rxh3#
- 1...Bb8
- 2.Rxh3#
- 1...Be5!
- 1...Bxf2
- 1.Qc4?
- 1...Bxf2
- 2.Rxh3#
- 1...Qg6
- 2.Qxg4#
- 1...Qf7
- 2.Qxg4#
- 1...Qe8
- 2.Qxg4#
- 1...Qh6
- 2.Qxg4#
- 1...Qh7
- 2.Qxg4#
- 1...Qh8
- 2.Qxg4#
- 1...Rh1
- 2.fxg3#
- 1...Rh2
- 2.fxg3#
- 1...Bh2
- 2.Rxh3#
- 1...Bf4
- 2.Rxh3#
- 1...Bd6
- 2.Rxh3#
- 1...Bc7
- 2.Rxh3#
- 1...Bb8
- 2.Rxh3#
- 1...Be5!
- 1...Bxf2
- 1.Qe4?
- 1...Bxf2
- 2.Rxh3#
- 1...Qg6
- 2.Qxg4#
- 1...Qf7
- 2.Qxg4#
- 1...Qe8
- 2.Qxg4#
- 1...Qh6
- 2.Qxg4#
- 1...Qh7
- 2.Qxg4#
- 1...Qh8
- 2.Qxg4#
- 1...Rh1
- 2.fxg3#
- 1...Rh2
- 2.fxg3#
- 1...Bh2
- 2.Rxh3#
- 1...Bf4
- 2.Rxh3#
- 1...Bd6
- 2.Rxh3#
- 1...Bc7
- 2.Rxh3#
- 1...Bb8
- 2.Rxh3#
- 1...Be5!
- 1...Bxf2
- 1.Qf4?
- 1...Bxf2
- 2.Rxh3#
- 1...Bxf4
- 2.Rxh3#
- 1...Qg6
- 2.Qxg4#
- 1...Qf7
- 2.Qxg4#
- 1...Qe8
- 2.Qxg4#
- 1...Qh6
- 2.Qxg4#
- 1...Qh7
- 2.Qxg4#
- 1...Qh8
- 2.Qxg4#
- 1...Rh1
- 2.Qxg3#
- 2.fxg3#
- 1...Rh2
- 2.Qxg3#
- 2.fxg3#
- 1...Bh2
- 2.Rxh3#
- 1...gxf4!
- 1...Bxf2
- 1.Ka2?
- Keys
- 1.Kb2!
- 1...Bxf2
- 2.Rxh3#
- 1...Qg6
- 2.Qxg4#
- 1...Qf7
- 2.Qxg4#
- 1...Qe8
- 2.Qxg4#
- 1...Qh6
- 2.Qxg4#
- 1...Qh7
- 2.Qxg4#
- 1...Qh8
- 2.Qxg4#
- 1...Rh1
- 2.fxg3#
- 1...Rh2
- 2.fxg3#
- 1...Bh2
- 2.Rxh3#
- 1...Bf4
- 2.Rxh3#
- 1...Be5
- 2.Rxh3#
- 1...Bd6
- 2.Rxh3#
- 1...Bc7
- 2.Rxh3#
- 1...Bb8
- 2.Rxh3#
- 1...Bxf2
- 1.Kb2!
This anticipates 71087(1987)
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- Q(f);N_GUARD::QAR1(F),XS(c)
- R(b);N_GUARD,P_PINB(B)::P(C),XB(a)
- R(b);N_GUARD::P(C),XB(a)
- B(a);OGATE,XP(C)::R1(E),XR(b)
- B(a);OGATE::R1(E),XR(b)
- B(a);N_SPINS(c),OGATE::R1(E),XR(b)
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- B(a);OGATE,XP(C)::R1(E),XR(b)
- Q(f);N_GUARD::QAR1(F),XS(c)
- R(b);N_GUARD::P(C),XB(a)
- B(a);OGATE::R1(E),XR(b)
- B(a);N_SPINS(c),OGATE::R1(E),XR(b)
- Refutation
- Q(f);CHECK
- Try
- B(B);
- Vars
- B(a);OGATE,XP(C)::R1(E),XR(b)
- Q(f);N_GUARD::QAR1(F),XS(c)
- R(b);N_GUARD::P(C),XB(a)
- B(a);OGATE::R1(E),XR(b)
- B(a);N_SPINS(c),OGATE::R1(E),XR(b)
- Refutation
- R(b);CHECK
- Try
- R(E);
- Vars
- B(a);OGATE,XP(C)::R1(E),XR(b)
- Q(f);N_GUARD::QAR1(F),XS(c)
- R(b);N_GUARD,P_PINB(B)::P(C),XB(a)
- R(b);N_GUARD::P(C),XB(a)
- B(a);OGATE::R1(E),XR(b)
- B(a);N_SPINS(c),OGATE::R1(E),XR(b)
- B(a);OGATE,P_PINQ(F)::R1(E),XR(b)
- Refutation
- Q(f);P_PINQ(F)
- Try
- R(E);
- Vars
- B(a);OGATE,XP(C)::R1(E),XR(b)
- Q(f);N_GUARD::QAR1(F),XS(c)
- R(b);N_GUARD,P_PINB(B)::P(C),XB(a)
- R(b);N_GUARD::P(C),XB(a)
- B(a);OGATE::R1(E),XR(b)
- B(a);N_SPINS(c),OGATE::R1(E),XR(b)
- B(a);OGATE,P_PINQ(F)::R1(E),XR(b)
- Refutation
- Q(f);P_PINQ(F)
- Try
- R(E);
- Vars
- B(a);OGATE,XP(C)::R1(E),XR(b)
- Q(f);N_GUARD::QAR1(F),XS(c)
- R(b);N_GUARD,P_PINB(B)::P(C),XB(a)
- R(b);N_GUARD::P(C),XB(a)
- B(a);OGATE::R1(E),XR(b)
- B(a);N_SPINS(c),OGATE::R1(E),XR(b)
- B(a);OGATE,P_PINQ(F)::R1(E),XR(b)
- Refutation
- Q(f);P_PINQ(F)
- Try
- R(E);
- Vars
- B(a);OGATE,XP(C)::R1(E),XR(b)
- Q(f);N_GUARD::QAR1(F),XS(c)
- R(b);N_GUARD,P_PINB(B)::P(C),XB(a)
- R(b);N_GUARD::P(C),XB(a)
- B(a);OGATE::R1(E),XR(b)
- B(a);N_SPINS(c),OGATE::R1(E),XR(b)
- B(a);OGATE,P_PINQ(F)::R1(E),XR(b)
- Refutation
- Q(f);P_PINQ(F)
- Try
- Q(F);
- Vars
- B(a);OGATE,XP(C)::R1(E),XR(b)
- Q(f);N_GUARD::QAR1(F),XS(c)
- Q(f);N_GUARD,P_PINR(E)::QAR1(F),XS(c)
- R(b);N_GUARD,P_PINB(B)::P(C),XB(a)
- R(b);N_GUARD::P(C),XB(a)
- B(a);OGATE::R1(E),XR(b)
- B(a);N_SPINS(c),OGATE::R1(E),XR(b)
- Refutation
- B(a);P_PINR(E)
- Try
- Q(F);
- Vars
- B(a);OGATE,XP(C)::R1(E),XR(b)
- Q(f);N_GUARD::QAR1(F),XS(c)
- Q(f);N_GUARD,P_PINR(E)::QAR1(F),XS(c)
- R(b);N_GUARD,P_PINB(B)::P(C),XB(a)
- R(b);N_GUARD::P(C),XB(a)
- B(a);OGATE::R1(E),XR(b)
- B(a);N_SPINS(c),OGATE::R1(E),XR(b)
- Refutation
- B(a);P_PINR(E)
- Try
- Q(F);
- Vars
- B(a);OGATE,XP(C)::R1(E),XR(b)
- Q(f);N_GUARD::QAR1(F),XS(c)
- Q(f);N_GUARD,P_PINR(E)::QAR1(F),XS(c)
- R(b);N_GUARD,P_PINB(B)::P(C),XB(a)
- R(b);N_GUARD::P(C),XB(a)
- B(a);OGATE::R1(E),XR(b)
- B(a);N_SPINS(c),OGATE::R1(E),XR(b)
- Refutation
- B(a);P_PINR(E)
- Try
- Q(F);
- Vars
- B(a);OGATE,XP(C)::R1(E),XR(b)
- Q(f);N_GUARD::QAR1(F),XS(c)
- Q(f);N_GUARD,P_PINR(E)::QAR1(F),XS(c)
- R(b);N_GUARD,P_PINB(B)::P(C),XB(a)
- R(b);N_GUARD::P(C),XB(a)
- B(a);OGATE::R1(E),XR(b)
- B(a);N_SPINS(c),OGATE::R1(E),XR(b)
- Refutation
- B(a);P_PINR(E)
- Try
- Q(F);
- Vars
- B(a);OGATE,XP(C)::R1(E),XR(b)
- B(a);N_SPINS(c),OGATE,XQ(F)::R1(E),XR(b)
- Q(f);N_GUARD::QAR1(F),XS(c)
- Q(f);N_GUARD,P_PINR(E)::QAR1(F),XS(c)
- B(a);OGATE::R1(E),XR(b)
- Refutation
- P(e);N_SPINS(c),XQ(F)
- Try
- Actual
- K(A);S_FLIGHT
- Vars
- B(a);OGATE,XP(C)::R1(E),XR(b)
- Q(f);N_GUARD::QAR1(F),XS(c)
- R(b);N_GUARD::P(C),XB(a)
- B(a);OGATE::R1(E),XR(b)
- B(a);N_SPINS(c),OGATE::R1(E),XR(b)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
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