MESON Chess Problem Database
Problem Display
PID: 2901 (K7/6nB/5RPb/2p5/1nP1k1p1/pQ5N/P2P1p2/BN3r2 w - - 0 1)
Blake, Percy Francis
Source?, 1905
#2
11 + 9
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Rxb1
- 2.Sxf2#
- 1...Rc1
- 2.Sxf2#
- 1...Rd1
- 2.Sxf2#
- 1...Re1
- 2.Sxf2#
- 1...Rg1
- 2.Sxf2#
- 1...Rh1
- 2.Sxf2#
- 1...Bxd2
- 2.Sxd2#
- 1...Be3
- 2.Qxe3#
- 1...Bf4
- 2.Rxf4#
- 1...Bg5
- 2.Sxg5#
- 1...Sxa2
- 2.Qc2#
- 1...Sc2
- 2.Qxc2#
- 1...Sd3
- 2.Qb7#
- 1...Sd5
- 2.Qc2#
- 1...Sa6
- 2.Qc2#
- 1...Sc6
- 2.Qc2#
- 1...Sf5
- 2.Re6#
- 1...Sh5
- 2.g7#
- 1...Se6
- 2.g7#
- 1...Se8
- 2.g7#
- 1...gxh3
- 2.Qf3#
- 1...g3
- 2.Qf3#
- 1...Rxb1
- Tries
- 1.Ka7?
- 1...Rxb1
- 2.Sxf2#
- 1...Bxd2
- 2.Sxd2#
- 1...Sxa2
- 2.Qc2#
- 1...gxh3
- 2.Qf3#
- 1...Rc1
- 2.Sxf2#
- 1...Rd1
- 2.Sxf2#
- 1...Re1
- 2.Sxf2#
- 1...Rg1
- 2.Sxf2#
- 1...Rh1
- 2.Sxf2#
- 1...Be3
- 2.Qxe3#
- 1...Bf4
- 2.Rxf4#
- 1...Bg5
- 2.Sxg5#
- 1...Sc2
- 2.Qxc2#
- 1...Sd3
- 2.Qb7#
- 1...Sd5
- 2.Qc2#
- 1...Sa6
- 2.Qc2#
- 1...Sf5
- 2.Re6#
- 1...Sh5
- 2.g7#
- 1...Se6
- 2.g7#
- 1...Se8
- 2.g7#
- 1...g3
- 2.Qf3#
- 1...Sc6+!
- 1...Rxb1
- 1.Kb7?
- 1...Rxb1
- 2.Sxf2#
- 1...Bxd2
- 2.Sxd2#
- 1...Sxa2
- 2.Qc2#
- 1...gxh3
- 2.Qf3#
- 1...Rc1
- 2.Sxf2#
- 1...Rd1
- 2.Sxf2#
- 1...Re1
- 2.Sxf2#
- 1...Rg1
- 2.Sxf2#
- 1...Rh1
- 2.Sxf2#
- 1...Be3
- 2.Qxe3#
- 1...Bf4
- 2.Rxf4#
- 1...Bg5
- 2.Sxg5#
- 1...Sc2
- 2.Qxc2#
- 1...Sd5
- 2.Qc2#
- 1...Sa6
- 2.Qc2#
- 1...Sc6
- 2.Qc2#
- 1...Sf5
- 2.Re6#
- 1...Sh5
- 2.g7#
- 1...Se6
- 2.g7#
- 1...Se8
- 2.g7#
- 1...g3
- 2.Qf3#
- 1...Sd3!
- 1...Rxb1
- 1.Bb2?
- 1...Rxb1
- 2.Sxf2#
- 1...Bxd2
- 2.Sxd2#
- 1...Sxa2
- 2.Qc2#
- 1...gxh3
- 2.Qf3#
- 1...Rc1
- 2.Sxf2#
- 1...Rd1
- 2.Sxf2#
- 1...Re1
- 2.Sxf2#
- 1...Rg1
- 2.Sxf2#
- 1...Rh1
- 2.Sxf2#
- 1...Be3
- 2.Qxe3#
- 1...Bf4
- 2.Rxf4#
- 1...Bg5
- 2.Sxg5#
- 1...Sc2
- 2.Qxc2#
- 1...Sd3
- 2.Qb7#
- 1...Sd5
- 2.Qc2#
- 1...Sa6
- 2.Qc2#
- 1...Sc6
- 2.Qc2#
- 1...Sf5
- 2.Re6#
- 1...Sh5
- 2.g7#
- 1...Se6
- 2.g7#
- 1...Se8
- 2.g7#
- 1...g3
- 2.Qf3#
- 1...axb2!
- 1...Rxb1
- 1.Re6+?
- 1...Sxe6
- 2.g7#
- 1...Kf5!
- 1...Sxe6
- 1.Rf7?
- 1...Rxb1
- 2.Sxf2#
- 1...Bxd2
- 2.Sxd2#
- 1...Sxa2
- 2.Qc2#
- 1...gxh3
- 2.Qf3#
- 1...Rc1
- 2.Sxf2#
- 1...Rd1
- 2.Sxf2#
- 1...Re1
- 2.Sxf2#
- 1...Rg1
- 2.Sxf2#
- 1...Rh1
- 2.Sxf2#
- 1...Be3
- 2.Qxe3#
- 1...Bf4
- 2.Rxf4#
- 1...Bg5
- 2.Sxg5#
- 1...Sc2
- 2.Qxc2#
- 1...Sd3
- 2.Qb7#
- 1...Sd5
- 2.Qc2#
- 1...Sa6
- 2.Qc2#
- 1...Sc6
- 2.Qc2#
- 1...Sh5
- 2.g7#
- 1...Se6
- 2.g7#
- 1...Se8
- 2.g7#
- 1...g3
- 2.Qf3#
- 1...Sf5!
- 1...Rxb1
- 1.Rf8?
- 1...Rxb1
- 2.Sxf2#
- 1...Bxd2
- 2.Sxd2#
- 1...Sxa2
- 2.Qc2#
- 1...gxh3
- 2.Qf3#
- 1...Rc1
- 2.Sxf2#
- 1...Rd1
- 2.Sxf2#
- 1...Re1
- 2.Sxf2#
- 1...Rg1
- 2.Sxf2#
- 1...Rh1
- 2.Sxf2#
- 1...Be3
- 2.Qxe3#
- 1...Bf4
- 2.Rxf4#
- 1...Bg5
- 2.Sxg5#
- 1...Sc2
- 2.Qxc2#
- 1...Sd3
- 2.Qb7#
- 1...Sd5
- 2.Qc2#
- 1...Sa6
- 2.Qc2#
- 1...Sc6
- 2.Qc2#
- 1...Sh5
- 2.g7#
- 1...Se6
- 2.g7#
- 1...Se8
- 2.g7#
- 1...g3
- 2.Qf3#
- 1...Sf5!
- 1...Rxb1
- 1.Qc3?
- 1...Rxb1
- 2.Sxf2#
- 1...Bxd2
- 2.Sxd2#
- 1...Sxa2
- 2.Qc2#
- 1...gxh3
- 2.Qf3#
- 1...Rc1
- 2.Sxf2#
- 1...Rd1
- 2.Sxf2#
- 1...Re1
- 2.Sxf2#
- 1...Rg1
- 2.Sxf2#
- 1...Rh1
- 2.Sxf2#
- 1...Be3
- 2.Qxe3#
- 1...Bf4
- 2.Rxf4#
- 1...Bg5
- 2.Sxg5#
- 1...Sc2
- 2.Qxc2#
- 1...Sd5
- 2.Qc2#
- 1...Sa6
- 2.Qc2#
- 1...Sc6
- 2.Qc2#
- 1...Sf5
- 2.Re6#
- 1...Sh5
- 2.g7#
- 1...Se6
- 2.g7#
- 1...Se8
- 2.g7#
- 1...g3
- 2.Qf3#
- 1...Sd3!
- 1...Rxb1
- 1.Ka7?
- Keys
- 1.Qg3!
- 1...Rxb1
- 2.Sxf2#
- 1...Bxd2
- 2.Sxd2#
- 1...Sxa2
- 2.d3#
- 1...gxh3
- 2.Qf3#
- 1...Be3
- 2.Qxe3#
- 1...Sd3
- 2.Qg2#
- 1...Rc1
- 2.Sxf2#
- 1...Rd1
- 2.Sxf2#
- 1...Re1
- 2.Sxf2#
- 1...Rg1
- 2.Sxf2#
- 1...Rh1
- 2.Sxf2#
- 1...Bf4
- 2.Rxf4#
- 1...Bg5
- 2.Sxg5#
- 1...Sc2
- 2.d3#
- 1...Sd5
- 2.d3#
- 1...Sa6
- 2.d3#
- 1...Sc6
- 2.d3#
- 1...Sf5
- 2.Re6#
- 1...Sh5
- 2.g7#
- 1...Se6
- 2.g7#
- 1...Se8
- 2.g7#
- 1...Rxb1
- 1.Qg3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 6
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- R(a);N_GUARD,XS(B)::S(F),XP(b)
- R(a);N_GUARD::S(F),XP(b)
- B(h);XP(D)::S(B),XB(h)
- B(h);N_GUARD::QAR1(E),XB(h)
- B(h);N_GUARD::R1(H),XB(h)
- B(h);N_GUARD::S(F),XB(h)
- S(d);N_GUARD,XP(C)::QAB(E)
- S(d);N_GUARD::QAB(E),XS(d)
- S(d);OGATE,SBLOCK::QAB(E)
- S(d);N_GUARD::QAB(E)
- S(i);N_GUARD,SBLOCK::R(H)
- S(i);OGATE::B(J)+P(I)
- P(f);N_GUARD,XS(F)::QAB1(E)
- P(f);N_GUARD::QAB1(E)
- Tries
- Try
- K(K);P-FLIGHT
- Vars
- R(a);N_GUARD,XS(B)::S(F),XP(b)
- B(h);XP(D)::S(B),XB(h)
- S(d);N_GUARD,XP(C)::QAB(E)
- P(f);N_GUARD,XS(F)::QAB1(E)
- R(a);N_GUARD::S(F),XP(b)
- B(h);N_GUARD::QAR1(E),XB(h)
- B(h);N_GUARD::R1(H),XB(h)
- B(h);N_GUARD::S(F),XB(h)
- S(d);N_GUARD::QAB(E),XS(d)
- S(d);OGATE,SBLOCK::QAB(E)
- S(d);N_GUARD::QAB(E)
- S(i);N_GUARD,SBLOCK::R(H)
- S(i);OGATE::B(J)+P(I)
- P(f);N_GUARD::QAB1(E)
- Refutation
- S(d);CHECK
- Try
- K(K);S_FLIGHT
- Vars
- R(a);N_GUARD,XS(B)::S(F),XP(b)
- B(h);XP(D)::S(B),XB(h)
- S(d);N_GUARD,XP(C)::QAB(E)
- P(f);N_GUARD,XS(F)::QAB1(E)
- R(a);N_GUARD::S(F),XP(b)
- B(h);N_GUARD::QAR1(E),XB(h)
- B(h);N_GUARD::R1(H),XB(h)
- B(h);N_GUARD::S(F),XB(h)
- S(d);N_GUARD::QAB(E),XS(d)
- S(d);N_GUARD::QAB(E)
- S(i);N_GUARD,SBLOCK::R(H)
- S(i);OGATE::B(J)+P(I)
- P(f);N_GUARD::QAB1(E)
- Refutation
- S(d);
- Try
- B(A);
- Vars
- R(a);N_GUARD,XS(B)::S(F),XP(b)
- B(h);XP(D)::S(B),XB(h)
- S(d);N_GUARD,XP(C)::QAB(E)
- P(f);N_GUARD,XS(F)::QAB1(E)
- R(a);N_GUARD::S(F),XP(b)
- B(h);N_GUARD::QAR1(E),XB(h)
- B(h);N_GUARD::R1(H),XB(h)
- B(h);N_GUARD::S(F),XB(h)
- S(d);N_GUARD::QAB(E),XS(d)
- S(d);OGATE,SBLOCK::QAB(E)
- S(d);N_GUARD::QAB(E)
- S(i);N_GUARD,SBLOCK::R(H)
- S(i);OGATE::B(J)+P(I)
- P(f);N_GUARD::QAB1(E)
- Refutation
- P(c);XB(A)
- Try
- R(H);CHECK
- Vars
- S(i);OGATE,XR(H)::B(J)+P(I)
- Refutation
- K(e);S_FLIGHT
- Try
- R(H);
- Vars
- R(a);N_GUARD,XS(B)::S(F),XP(b)
- B(h);XP(D)::S(B),XB(h)
- S(d);N_GUARD,XP(C)::QAB(E)
- P(f);N_GUARD,XS(F)::QAB1(E)
- R(a);N_GUARD::S(F),XP(b)
- B(h);N_GUARD::QAR1(E),XB(h)
- B(h);N_GUARD::R1(H),XB(h)
- B(h);N_GUARD::S(F),XB(h)
- S(d);N_GUARD::QAB(E),XS(d)
- S(d);OGATE,SBLOCK::QAB(E)
- S(d);N_GUARD::QAB(E)
- S(i);OGATE::B(J)+P(I)
- P(f);N_GUARD::QAB1(E)
- Refutation
- S(i);
- Try
- R(H);
- Vars
- R(a);N_GUARD,XS(B)::S(F),XP(b)
- B(h);XP(D)::S(B),XB(h)
- S(d);N_GUARD,XP(C)::QAB(E)
- P(f);N_GUARD,XS(F)::QAB1(E)
- R(a);N_GUARD::S(F),XP(b)
- B(h);N_GUARD::QAR1(E),XB(h)
- B(h);N_GUARD::R1(H),XB(h)
- B(h);N_GUARD::S(F),XB(h)
- S(d);N_GUARD::QAB(E),XS(d)
- S(d);OGATE,SBLOCK::QAB(E)
- S(d);N_GUARD::QAB(E)
- S(i);OGATE::B(J)+P(I)
- P(f);N_GUARD::QAB1(E)
- Refutation
- S(i);
- Try
- Q(E);
- Vars
- R(a);N_GUARD,XS(B)::S(F),XP(b)
- B(h);XP(D)::S(B),XB(h)
- S(d);N_GUARD,XP(C)::QAB(E)
- P(f);N_GUARD,XS(F)::QAB1(E)
- R(a);N_GUARD::S(F),XP(b)
- B(h);N_GUARD::QAR1(E),XB(h)
- B(h);N_GUARD::R1(H),XB(h)
- B(h);N_GUARD::S(F),XB(h)
- S(d);N_GUARD::QAB(E),XS(d)
- S(d);N_GUARD::QAB(E)
- S(i);N_GUARD,SBLOCK::R(H)
- S(i);OGATE::B(J)+P(I)
- P(f);N_GUARD::QAB1(E)
- Refutation
- S(d);
- Try
- Actual
- Q(E);
- Vars
- R(a);N_GUARD,XS(B)::S(F),XP(b)
- B(h);XP(D)::S(B),XB(h)
- S(d);N_GUARD,XP(C)::P(D)
- P(f);N_GUARD,XS(F)::QAB1(E)
- B(h);N_GUARD::QAR1(E),XB(h)
- S(d);SBLOCK::QAB(E)
- R(a);N_GUARD::S(F),XP(b)
- B(h);N_GUARD::R1(H),XB(h)
- B(h);N_GUARD::S(F),XB(h)
- S(d);N_GUARD::P(D)
- S(i);N_GUARD,SBLOCK::R(H)
- S(i);OGATE::B(J)+P(I)
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).