MESON Chess Problem Database
Problem Display
PID: 22087 (1B1rr3/K4R2/1p1n1Np1/4k1Np/4P1RP/8/2b2Q2/8 w - - 0 1)
Blake, Percy Francis
1st HM., Falkirk Herald (Change Mate Ty.), 1924
#2
9 + 8
SOLUTION
- SOUND
- Sets
- 1...Rd7+
- 2.Sxd7#
- 1...Rxb8
- 2.Sd7#
- 1...Rc8
- 2.Sd7#
- 1...Re6
- 2.Sf3#
- 1...Re7+
- 2.Rxe7#
- 1...Rf8
- 2.Re7#
- 1...Rg8
- 2.Re7#
- 1...Rh8
- 2.Re7#
- 1...Bb1
- 2.Qb2#
- 1...Bd1
- 2.Qb2#
- 1...Bb3
- 2.Qb2#
- 1...Bd3
- 2.Qb2#
- 1...Ba4
- 2.Qb2#
- 1...Bxe4
- 2.Rxe4#
- 1...hxg4
- 2.Sxg4#
- 1...b5
- 2.Qc5#
- 1...Rd7+
- Tries
- 1.Ka6?
- 1...Rxb8
- 2.Sd7#
- 1...Bxe4
- 2.Rxe4#
- 1...hxg4
- 2.Sxg4#
- 1...Rd7
- 2.Sxd7#
- 1...Rc8
- 2.Sd7#
- 1...Re6
- 2.Sf3#
- 1...Re7
- 2.Rxe7#
- 1...Rf8
- 2.Re7#
- 1...Rg8
- 2.Re7#
- 1...Rh8
- 2.Re7#
- 1...Bb1
- 2.Qb2#
- 1...Bd1
- 2.Qb2#
- 1...Bb3
- 2.Qb2#
- 1...Ba4
- 2.Qb2#
- 1...b5
- 2.Qc5#
- 1...Bd3+!
- 1...Rxb8
- 1.Kxb6?
- threat
- 2.Qc5#
- 1...Bxe4
- 2.Rxe4#
- 1...hxg4
- 2.Sxg4#
- 1...Rc8
- 2.Sd7#
- 1...Bb3
- 2.Qb2#
- 1...Rxb8+!
- threat
- 1.Ka8?
- 1...Bxe4+
- 2.Rxe4#
- 1...hxg4
- 2.Sxg4#
- 1...Rd7
- 2.Sxd7#
- 1...Rc8
- 2.Sd7#
- 1...Re6
- 2.Sf3#
- 1...Re7
- 2.Rxe7#
- 1...Rf8
- 2.Re7#
- 1...Rg8
- 2.Re7#
- 1...Rh8
- 2.Re7#
- 1...Bb1
- 2.Qb2#
- 1...Bd1
- 2.Qb2#
- 1...Bb3
- 2.Qb2#
- 1...Bd3
- 2.Qb2#
- 1...Ba4
- 2.Qb2#
- 1...b5
- 2.Qc5#
- 1...Rxb8+!
- 1...Bxe4+
- 1.Bc7?
- 1...Bxe4
- 2.Rxe4#
- 1...hxg4
- 2.Sxg4#
- 1...Rd7
- 2.Sxd7#
- 1...Rb8
- 2.Sd7#
- 1...Rc8
- 2.Sd7#
- 1...Re6
- 2.Sf3#
- 1...Re7
- 2.Rxe7#
- 1...Rf8
- 2.Re7#
- 1...Rg8
- 2.Re7#
- 1...Rh8
- 2.Re7#
- 1...Bb1
- 2.Qb2#
- 1...Bd1
- 2.Qb2#
- 1...Bb3
- 2.Qb2#
- 1...Bd3
- 2.Qb2#
- 1...Ba4
- 2.Qb2#
- 1...b5
- 2.Qc5#
- 1...Ra8+!
- 1...Bxe4
- 1.Rd7?
- threat
- 2.Bxd6#
- 1...Rxd7+
- 2.Sxd7#
- 1...Re6
- 2.Sf7#
- 1...Rxb8!
- threat
- 1.Rg7?
- 1...Rd7+
- 2.Sxd7#
- 1...Re7+
- 2.Rxe7#
- 1...Rxb8
- 2.Sd7#
- 1...Bxe4
- 2.Rxe4#
- 1...hxg4
- 2.Sxg4#
- 1...Re6
- 2.Sf7#
- 1...Rc8
- 2.Sd7#
- 1...Rf8
- 2.Re7#
- 1...Rg8
- 2.Re7#
- 1...Rh8
- 2.Re7#
- 1...Bb1
- 2.Qb2#
- 1...Bd1
- 2.Qb2#
- 1...Bb3
- 2.Qb2#
- 1...Bd3
- 2.Qb2#
- 1...Ba4
- 2.Qb2#
- 1...b5!
- 1...Rd7+
- 1.Rh7?
- 1...Rd7+
- 2.Sxd7#
- 1...Re7+
- 2.Rxe7#
- 1...Rxb8
- 2.Sd7#
- 1...Bxe4
- 2.Rxe4#
- 1...hxg4
- 2.Sxg4#
- 1...Re6
- 2.Sf7#
- 1...Rc8
- 2.Sd7#
- 1...Rf8
- 2.Re7#
- 1...Rg8
- 2.Re7#
- 1...Rh8
- 2.Re7#
- 1...Bb1
- 2.Qb2#
- 1...Bd1
- 2.Qb2#
- 1...Bb3
- 2.Qb2#
- 1...Bd3
- 2.Qb2#
- 1...Ba4
- 2.Qb2#
- 1...b5!
- 1...Rd7+
- 1.Ka6?
- Keys
- 1.Rb7!
- 1...Rxb8
- 2.Sd7#
- 1...Bxe4
- 2.Rxe4#
- 1...hxg4
- 2.Sxg4#
- 1...Re6
- 2.Sf7#
- 1...Rd7
- 2.Sxd7#
- 1...Rc8
- 2.Sd7#
- 1...Re7
- 2.Rxe7#
- 1...Rf8
- 2.Re7#
- 1...Rg8
- 2.Re7#
- 1...Rh8
- 2.Re7#
- 1...Bb1
- 2.Qb2#
- 1...Bd1
- 2.Qb2#
- 1...Bb3
- 2.Qb2#
- 1...Bd3
- 2.Qb2#
- 1...Ba4
- 2.Qb2#
- 1...b5
- 2.Rxb5#
- 1...Rxb8
- 1.Rb7!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(g);CHECK,N_GUARD::S(F),XR(g)
- R(g);N_GUARD,N_SPINS(e),XB(I)::S(F)
- R(g);N_GUARD::S(F)
- R(h);SBLOCK::S(E)
- R(h);CHECK,N_GUARD::R(H),XR(h)
- R(h);N_GUARD::R(H)
- B(a);OGATE::QAB(A)
- B(a);OGATE,XP(B)::R1(C),XB(a)
- P(c);XR(C)::S(F),XP(c)
- P(d);N_GUARD::QAR2(A)
- Tries
- Try
- K(G);P-FLIGHT
- Vars
- R(g);N_GUARD,N_SPINS(e),XB(I)::S(F)
- B(a);OGATE,XP(B)::R1(C),XB(a)
- P(c);XR(C)::S(F),XP(c)
- R(g);N_GUARD::S(F),XR(g)
- R(g);N_GUARD::S(F)
- R(h);SBLOCK::S(E)
- R(h);N_GUARD::R(H),XR(h)
- R(h);N_GUARD::R(H)
- B(a);OGATE::QAB(A)
- P(d);N_GUARD::QAR2(A)
- Refutation
- B(a);CHECK
- Try
- K(G);S_FLIGHT,XP(d)
- Threat
- QAR2(A)
- Vars
- B(a);OGATE,XP(B)::R1(C),XB(a)
- P(c);XR(C)::S(F),XP(c)
- R(g);N_GUARD::S(F)
- B(a);OGATE::QAB(A)
- Refutation
- R(g);CHECK,N_SPINS(e),XB(I)
- Try
- K(G);P-FLIGHT,P_SPINB(I)
- Vars
- B(a);CHECK,OGATE,XP(B)::R1(C),XB(a)
- P(c);XR(C)::S(F),XP(c)
- R(g);N_GUARD::S(F),XR(g)
- R(g);N_GUARD::S(F)
- R(h);SBLOCK::S(E)
- R(h);N_GUARD::R(H),XR(h)
- R(h);N_GUARD::R(H)
- B(a);OGATE::QAB(A)
- P(d);N_GUARD::QAR2(A)
- Refutation
- R(g);CHECK,N_SPINS(e),XB(I)
- Try
- B(I);
- Vars
- B(a);OGATE,XP(B)::R1(C),XB(a)
- P(c);XR(C)::S(F),XP(c)
- R(g);N_GUARD,P_PINB(I)::S(F),XR(g)
- R(g);N_GUARD::S(F)
- R(h);SBLOCK::S(E)
- R(h);N_GUARD,P_PINB(I)::R(H),XR(h)
- R(h);N_GUARD::R(H)
- B(a);OGATE::QAB(A)
- P(d);N_GUARD::QAR2(A)
- Refutation
- R(g);CHECK
- Try
- R(H);
- Threat
- B(I),XS(e)
- Vars
- R(g);CHECK,XR(H)::S(F),XR(g)
- R(h);SBLOCK::S(E)
- Refutation
- R(g);N_SPINS(e),XB(I)
- Try
- R(H);
- Vars
- R(g);CHECK,N_GUARD::S(F),XR(g)
- R(h);CHECK,N_GUARD::R(H),XR(h)
- R(g);N_GUARD,N_SPINS(e),XB(I)::S(F)
- B(a);OGATE,XP(B)::R1(C),XB(a)
- P(c);XR(C)::S(F),XP(c)
- R(h);SBLOCK::S(E)
- R(g);N_GUARD::S(F)
- R(h);N_GUARD::R(H)
- B(a);OGATE::QAB(A)
- Refutation
- P(d);
- Try
- R(H);
- Vars
- R(g);CHECK,N_GUARD::S(F),XR(g)
- R(h);CHECK,N_GUARD::R(H),XR(h)
- R(g);N_GUARD,N_SPINS(e),XB(I)::S(F)
- B(a);OGATE,XP(B)::R1(C),XB(a)
- P(c);XR(C)::S(F),XP(c)
- R(h);SBLOCK::S(E)
- R(g);N_GUARD::S(F)
- R(h);N_GUARD::R(H)
- B(a);OGATE::QAB(A)
- Refutation
- P(d);
- Try
- Actual
- R(H);
- Vars
- R(g);N_GUARD,N_SPINS(e),XB(I)::S(F)
- B(a);OGATE,XP(B)::R1(C),XB(a)
- P(c);XR(C)::S(F),XP(c)
- R(h);SBLOCK::S(E)
- R(g);N_GUARD,P_PINR(H)::S(F),XR(g)
- R(g);N_GUARD::S(F)
- R(h);N_GUARD,P_PINR(H)::R(H),XR(h)
- R(h);N_GUARD::R(H)
- B(a);OGATE::QAB(A)
- P(d);OGATE::R(H),XP(d)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).