MESON Chess Problem Database
Problem Display
PID: 211712 (KR1bN3/3p4/k2P4/3B4/P7/nN6/8/8 w - - 0 1)
Coward, John R
The Problemist, 1986
#2
7 + 4
SOLUTION
- SOUND
- Sets
- 1...Bh4
- 2.Sc7#
- 1...Ba5
- 2.Sc5#
- 1...Bg5
- 2.Sc7#
- 1...Bb6
- 2.Bb7#
- 1...Bf6
- 2.Sc7#
- 1...Bc7
- 2.Sxc7#
- 1...Be7
- 2.Sc7#
- 1...Sb1
- 2.Bc4#
- 1...Sc2
- 2.Bc4#
- 1...Sc4
- 2.Bxc4#
- 1...Sb5
- 2.axb5#
- 1...Bh4
- Tries
- 1.Bg2?
- 1...Bh4
- 2.Sc7#
- 1...Ba5
- 2.Sc5#
- 1...Bg5
- 2.Sc7#
- 1...Bb6
- 2.Bb7#
- 1...Bf6
- 2.Sc7#
- 1...Bc7
- 2.Sxc7#
- 1...Be7
- 2.Sc7#
- 1...Sb1
- 2.Bf1#
- 1...Sc2
- 2.Bf1#
- 1...Sb5
- 2.axb5#
- 1...Sc4!
- 1...Bh4
- 1.Bf3?
- 1...Bh4
- 2.Sc7#
- 1...Ba5
- 2.Sc5#
- 1...Bg5
- 2.Sc7#
- 1...Bb6
- 2.Bb7#
- 1...Bf6
- 2.Sc7#
- 1...Bc7
- 2.Sxc7#
- 1...Be7
- 2.Sc7#
- 1...Sb1
- 2.Be2#
- 1...Sc2
- 2.Be2#
- 1...Sb5
- 2.axb5#
- 1...Sc4!
- 1...Bh4
- 1.Bc4+?
- 1...Sb5
- 2.Bxb5#
- 2.axb5#
- 1...Sxc4!
- 1...Sb5
- 1.Be4?
- 1...Bh4
- 2.Sc7#
- 1...Ba5
- 2.Sc5#
- 1...Bg5
- 2.Sc7#
- 1...Bb6
- 2.Bb7#
- 1...Bf6
- 2.Sc7#
- 1...Bc7
- 2.Sxc7#
- 1...Be7
- 2.Sc7#
- 1...Sb1
- 2.Bd3#
- 1...Sc2
- 2.Bd3#
- 1...Sb5
- 2.axb5#
- 1...Sc4!
- 1...Bh4
- 1.Bc6?
- 1...Bh4
- 2.Sc7#
- 1...Ba5
- 2.Sc5#
- 1...Bg5
- 2.Sc7#
- 1...Bb6
- 2.Bb7#
- 1...Bf6
- 2.Sc7#
- 1...Bc7
- 2.Sxc7#
- 1...Be7
- 2.Sc7#
- 1...Sb1
- 2.Bb5#
- 1...Sc2
- 2.Bb5#
- 1...Sc4
- 2.Bb5#
- 1...Sb5
- 2.Bxb5#
- 2.axb5#
- 1...dxc6!
- 1...Bh4
- 1.Bf7?
- 1...Bh4
- 2.Sc7#
- 1...Ba5
- 2.Sc5#
- 1...Bg5
- 2.Sc7#
- 1...Bf6
- 2.Sc7#
- 1...Bc7
- 2.Sxc7#
- 1...Be7
- 2.Sc7#
- 1...Sb1
- 2.Bc4#
- 1...Sc2
- 2.Bc4#
- 1...Sc4
- 2.Bxc4#
- 1...Sb5
- 2.axb5#
- 1...Bb6!
- 1...Bh4
- 1.Bg8?
- 1...Bh4
- 2.Sc7#
- 1...Ba5
- 2.Sc5#
- 1...Bg5
- 2.Sc7#
- 1...Bf6
- 2.Sc7#
- 1...Bc7
- 2.Sxc7#
- 1...Be7
- 2.Sc7#
- 1...Sb1
- 2.Bc4#
- 1...Sc2
- 2.Bc4#
- 1...Sc4
- 2.Bxc4#
- 1...Sb5
- 2.axb5#
- 1...Bb6!
- 1...Bh4
- 1.Rb5?
- threat
- 2.Sc5#
- 2.Bb7#
- 1...Bb6
- 2.Bb7#
- 1...Sxb5!
- threat
- 1.Rb6+?
- 1...Bxb6
- 2.Bb7#
- 1...Kxb6!
- 1...Bxb6
- 1.Rb7?
- 1...Bh4
- 2.Sc7#
- 1...Ba5
- 2.Sc5#
- 1...Bg5
- 2.Sc7#
- 1...Bf6
- 2.Sc7#
- 1...Bc7
- 2.Sxc7#
- 1...Be7
- 2.Sc7#
- 1...Sb1
- 2.Bc4#
- 1...Sc2
- 2.Bc4#
- 1...Sc4
- 2.Bxc4#
- 1...Sb5
- 2.axb5#
- 1...Bb6!
- 1...Bh4
- 1.Bg2?
- Keys
- 1.a5!
- 1...Bxa5
- 2.Sc5#
- 1...Bb6
- 2.Rxb6#
- 1...Bh4
- 2.Sc7#
- 2.Rb6#
- 1...Bg5
- 2.Sc7#
- 2.Rb6#
- 1...Bf6
- 2.Sc7#
- 2.Rb6#
- 1...Bc7
- 2.Sxc7#
- 1...Be7
- 2.Sc7#
- 2.Rb6#
- 1...Sb1
- 2.Bc4#
- 1...Sc2
- 2.Bc4#
- 1...Sc4
- 2.Bxc4#
- 1...Sb5
- 2.Bb7#
- 1...Bxa5
- 1.a5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 4
- Sets
- B(d);N_GUARD,SBLOCK::S(G)
- B(d);SBLOCK::S(A)
- B(d);N_GUARD::S(G)
- B(d);SBLOCK::B(C)
- B(d);N_GUARD::S(G),XB(d)
- S(a);N_GUARD::B(C)
- S(a);N_GUARD::B(C),XS(a)
- S(a);OGATE::P(B),XS(a)
- Tries
- Try
- B(C);
- Vars
- B(d);N_GUARD,SBLOCK::S(G)
- B(d);SBLOCK::S(A)
- B(d);N_GUARD::S(G)
- B(d);SBLOCK::B(C)
- B(d);N_GUARD::S(G),XB(d)
- S(a);N_GUARD::B(C)
- S(a);OGATE::P(B),XS(a)
- Refutation
- S(a);
- Try
- B(C);
- Vars
- B(d);N_GUARD,SBLOCK::S(G)
- B(d);SBLOCK::S(A)
- B(d);N_GUARD::S(G)
- B(d);SBLOCK::B(C)
- B(d);N_GUARD::S(G),XB(d)
- S(a);N_GUARD::B(C)
- S(a);OGATE::P(B),XS(a)
- Refutation
- S(a);
- Try
- B(C);CHECK
- Refutation
- S(a);XB(C)
- Try
- B(C);
- Vars
- B(d);N_GUARD,SBLOCK::S(G)
- B(d);SBLOCK::S(A)
- B(d);N_GUARD::S(G)
- B(d);SBLOCK::B(C)
- B(d);N_GUARD::S(G),XB(d)
- S(a);N_GUARD::B(C)
- S(a);OGATE::P(B),XS(a)
- Refutation
- S(a);
- Try
- B(C);
- Vars
- B(d);N_GUARD,SBLOCK::S(G)
- B(d);SBLOCK::S(A)
- B(d);N_GUARD::S(G)
- B(d);SBLOCK::B(C)
- B(d);N_GUARD::S(G),XB(d)
- S(a);N_GUARD::B(C)
- Refutation
- P(c);XB(C)
- Try
- B(C);
- Vars
- B(d);N_GUARD,SBLOCK::S(G)
- B(d);SBLOCK::S(A)
- B(d);N_GUARD::S(G)
- B(d);N_GUARD::S(G),XB(d)
- S(a);N_GUARD::B(C)
- S(a);N_GUARD::B(C),XS(a)
- S(a);OGATE::P(B),XS(a)
- Refutation
- B(d);
- Try
- B(C);
- Vars
- B(d);N_GUARD,SBLOCK::S(G)
- B(d);SBLOCK::S(A)
- B(d);N_GUARD::S(G)
- B(d);N_GUARD::S(G),XB(d)
- S(a);N_GUARD::B(C)
- S(a);N_GUARD::B(C),XS(a)
- S(a);OGATE::P(B),XS(a)
- Refutation
- B(d);
- Try
- R(F);
- Threat
- DUALS(2)
- Vars
- B(d);::B(C)
- Refutation
- S(a);XR(F)
- Try
- R(F);CHECK
- Vars
- B(d);SBLOCK,XR(F)::B(C)
- Refutation
- K(b);P-FLIGHT,XR(F)
- Try
- R(F);
- Vars
- B(d);N_GUARD,SBLOCK::S(G)
- B(d);SBLOCK::S(A)
- B(d);N_GUARD::S(G)
- B(d);N_GUARD::S(G),XB(d)
- S(a);N_GUARD::B(C)
- S(a);N_GUARD::B(C),XS(a)
- S(a);OGATE::P(B),XS(a)
- Refutation
- B(d);
- Try
- Actual
- P(B);
- Vars
- B(d);SBLOCK,XP(B)::S(A)
- B(d);N_GUARD::R1(F),XB(d)
- B(d);N_GUARD::S(G),XB(d)
- S(a);N_GUARD::B(C)
- S(a);N_GUARD::B(C),XS(a)
- S(a);SBLOCK::B(C)
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).