MESON Chess Problem Database
Problem Display
PID: 35916 (2R3B1/p5bQ/P2pb3/3kN3/2N1p3/3p2p1/3n2K1/4R1B1 w - - 0 1)
Vaughan, O
Recomm., BCF 001. Ty., 1929-1930
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Bf7
- 2.Bxf7#
- 1...Bxg8
- 2.Qxg8#
- 1...Bxe5
- 2.Qb7#
- 1...Bf6
- 2.Qb7#
- 1...Bh6
- 2.Qb7#
- 1...Bf8
- 2.Qb7#
- 1...Bh8
- 2.Qb7#
- 1...Sb1
- 2.Qxe4#
- 1...Sf1
- 2.Qxe4#
- 1...Sb3
- 2.Qxe4#
- 1...Sf3
- 2.Qxe4#
- 1...Sxc4
- 2.Qxe4#
- 1...e3
- 2.Qxd3#
- 1...dxe5
- 2.Rc5#
- 1...Bf7
- Tries
- 1.Kh1?
- 1...Bxg8
- 2.Qxg8#
- 1...Bxe5
- 2.Qb7#
- 1...Sxc4
- 2.Qxe4#
- 1...dxe5
- 2.Rc5#
- 1...Bf7
- 2.Bxf7#
- 1...e3
- 2.Qxd3#
- 1...Bf6
- 2.Qb7#
- 1...Bh6
- 2.Qb7#
- 1...Bf8
- 2.Qb7#
- 1...Bh8
- 2.Qb7#
- 1...Sb1
- 2.Qxe4#
- 1...Sf1
- 2.Qxe4#
- 1...Sb3
- 2.Qxe4#
- 1...Sf3
- 2.Qxe4#
- 1...g2+!
- 1...Bxg8
- 1.Sxd3?
- threat
- 2.Sb4#
- 2.Sf4#
- 1...Bxg8
- 2.Sf4#
- 2.Qxg8#
- 1...Sxc4
- 2.Qxe4#
- 1...exd3
- 2.Bxe6#
- 1...Bf7
- 2.Sf4#
- 2.Bxf7#
- 1...Bc3
- 2.Sf4#
- 2.Qb7#
- 1...Be5
- 2.Sb4#
- 2.Qb7#
- 1...Bh6
- 2.Sb4#
- 2.Qf5#
- 2.Qb7#
- 1...e3!
- threat
- 1.Sf3?
- threat
- 2.Se3#
- 1...Bxg8
- 2.Qxg8#
- 1...Sxf3
- 2.Qxe4#
- 1...Sxc4
- 2.Qxe4#
- 1...Bf7
- 2.Bxf7#
- 1...Bd4
- 2.Qb7#
- 1...Bh6
- 2.Qf5#
- 2.Qb7#
- 1...Sf1
- 2.Qxe4#
- 1...e3
- 2.Sxe3#
- 1...exf3+!
- threat
- 1.Sg4?
- 1...Bxg8
- 2.Qxg8#
- 1...Sxc4
- 2.Qxe4#
- 1...Bf7
- 2.Bxf7#
- 1...Ba1
- 2.Qb7#
- 1...Bb2
- 2.Qb7#
- 1...Bc3
- 2.Qb7#
- 1...Bd4
- 2.Qb7#
- 1...Be5
- 2.Qb7#
- 1...Bf6
- 2.Sxf6#
- 2.Qb7#
- 1...Bh6
- 2.Sf6#
- 2.Qf5#
- 2.Qb7#
- 1...Bf8
- 2.Sf6#
- 2.Qf5#
- 2.Qh5#
- 2.Qb7#
- 1...Bh8
- 2.Qb7#
- 1...Sb1
- 2.Qxe4#
- 1...Sf1
- 2.Qxe4#
- 1...Sb3
- 2.Qxe4#
- 1...Sf3
- 2.Qxe4#
- 1...e3!
- 1...Bxg8
- 1.Bf2?
- 1...Bxg8
- 2.Qxg8#
- 1...Bxe5
- 2.Qb7#
- 1...Sxc4
- 2.Qxe4#
- 1...dxe5
- 2.Rc5#
- 1...Bf7
- 2.Bxf7#
- 1...e3
- 2.Qxd3#
- 1...Bf6
- 2.Qb7#
- 1...Bh6
- 2.Qb7#
- 1...Bf8
- 2.Qb7#
- 1...Bh8
- 2.Qb7#
- 1...Sb1
- 2.Qxe4#
- 1...Sf1
- 2.Qxe4#
- 1...Sb3
- 2.Qxe4#
- 1...Sf3
- 2.Qxe4#
- 1...gxf2!
- 1...Bxg8
- 1.Bxa7?
- 1...Bxg8
- 2.Qxg8#
- 1...Bxe5
- 2.Se3#
- 2.Qb7#
- 1...Sxc4
- 2.Qxe4#
- 1...Bf7
- 2.Bxf7#
- 1...Bf6
- 2.Qb7#
- 1...Bh6
- 2.Qb7#
- 1...Bf8
- 2.Qb7#
- 1...Bh8
- 2.Qb7#
- 1...Sb1
- 2.Qxe4#
- 1...Sf1
- 2.Qxe4#
- 1...Sb3
- 2.Qxe4#
- 1...Sf3
- 2.Qxe4#
- 1...e3
- 2.Qxd3#
- 1...dxe5!
- 1...Bxg8
- 1.Re2?
- 1...Bxg8
- 2.Qxg8#
- 1...Bxe5
- 2.Qb7#
- 1...Sxc4
- 2.Qxe4#
- 1...dxe5
- 2.Rc5#
- 1...Bf7
- 2.Bxf7#
- 1...e3
- 2.Qxd3#
- 1...Sb3
- 2.Qxe4#
- 1...Bf6
- 2.Qb7#
- 1...Bh6
- 2.Qb7#
- 1...Bf8
- 2.Qb7#
- 1...Bh8
- 2.Qb7#
- 1...Sb1
- 2.Qxe4#
- 1...Sf1
- 2.Qxe4#
- 1...Sf3
- 2.Qxe4#
- 1...dxe2!
- 1...Bxg8
- 1.Qf5?
- threat
- 2.Bxe6#
- 2.Qxe6#
- 1...e3
- 2.Qxd3#
- 1...Bf7
- 2.Bxf7#
- 2.Qxf7#
- 1...Bxg8!
- threat
- 1.Qg6?
- threat
- 2.Bxe6#
- 2.Qxe6#
- 1...Bxg8
- 2.Qxd6#
- 1...Sxc4
- 2.Qxe4#
- 2.Qxe6#
- 1...e3
- 2.Qxd3#
- 1...Bf7
- 2.Bxf7#
- 2.Qxf7#
- 2.Qxd6#
- 1...Bf6!
- threat
- 1.Kh1?
- Keys
- 1.Bc5!
- 1...Bxg8
- 2.Qxg8#
- 1...Bxe5
- 2.Se3#
- 1...Sxc4
- 2.Qxe4#
- 1...dxc5
- 2.Rd8#
- 1...dxe5
- 2.Se3#
- 1...Bf7
- 2.Bxf7#
- 1...Bf6
- 2.Qb7#
- 1...Bh6
- 2.Qb7#
- 1...Bf8
- 2.Qb7#
- 1...Bh8
- 2.Qb7#
- 1...Sb1
- 2.Qxe4#
- 1...Sf1
- 2.Qxe4#
- 1...Sb3
- 2.Qxe4#
- 1...Sf3
- 2.Qxe4#
- 1...e3
- 2.Qxd3#
- 1...Bxg8
- 1.Bc5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- B(g);OGATEB::B(I),XB(g)
- B(g);N_SPINB(g),OGATE,XB(I)::QAB(G),XB(g)
- B(i);OGATE,XS(E)::QAB(G)
- B(i);OGATE::QAB(G)
- S(a);N_GUARD::QAB1(G),XP(d)
- S(a);N_GUARD,XS(D)::QAB1(G),XP(d)
- P(d);OGATE::QAR2(G),XP(b)
- P(f);N_GUARD,XS(E)::R1(H)
- Tries
- Try
- K(C);S_FLIGHT
- Vars
- B(g);N_SPINB(g),OGATE,XB(I)::QAB(G),XB(g)
- B(i);OGATE,XS(E)::QAB(G)
- S(a);N_GUARD,XS(D)::QAB1(G),XP(d)
- P(f);N_GUARD,XS(E)::R1(H)
- B(g);OGATEB::B(I),XB(g)
- P(d);OGATE::QAR2(G),XP(b)
- B(i);OGATE::QAB(G)
- S(a);N_GUARD::QAB1(G),XP(d)
- Refutation
- P(c);CHECK
- Try
- S(E);XP(b)
- Threat
- DUALS(2)
- Vars
- S(a);N_GUARD,XS(D)::QAB1(G),XP(d)
- P(d);XS(E)::B(I),XB(g)
- Refutation
- P(d);
- Try
- S(E);
- Threat
- S(D)
- Vars
- B(g);N_SPINB(g),OGATE,XB(I)::QAB(G),XB(g)
- S(a);N_GUARD,XS(E)::QAB1(G),XP(d)
- S(a);N_GUARD,XS(D)::QAB1(G),XP(d)
- B(g);OGATEB::B(I),XB(g)
- B(i);OGATE::QAB(G)
- S(a);N_GUARD::QAB1(G),XP(d)
- P(d);::S(D),XP(d)
- Refutation
- P(d);CHECK,XS(E)
- Try
- S(E);
- Vars
- B(g);N_SPINB(g),OGATE,XB(I)::QAB(G),XB(g)
- S(a);N_GUARD,XS(D)::QAB1(G),XP(d)
- B(g);OGATEB::B(I),XB(g)
- B(i);OGATE::QAB(G)
- S(a);N_GUARD::QAB1(G),XP(d)
- Refutation
- P(d);
- Try
- B(B);
- Vars
- B(g);N_SPINB(g),OGATE,XB(I)::QAB(G),XB(g)
- B(i);OGATE,XS(E)::QAB(G)
- S(a);N_GUARD,XS(D)::QAB1(G),XP(d)
- P(f);N_GUARD,XS(E)::R1(H)
- B(g);OGATEB::B(I),XB(g)
- P(d);OGATE::QAR2(G),XP(b)
- B(i);OGATE::QAB(G)
- S(a);N_GUARD::QAB1(G),XP(d)
- Refutation
- P(c);XB(B)
- Try
- B(B);XP(h)
- Vars
- B(g);N_SPINB(g),OGATE,XB(I)::QAB(G),XB(g)
- S(a);N_GUARD,XS(D)::QAB1(G),XP(d)
- B(g);OGATEB::B(I),XB(g)
- B(i);OGATE::QAB(G)
- S(a);N_GUARD::QAB1(G),XP(d)
- P(d);OGATE::QAR2(G),XP(b)
- Refutation
- P(f);XS(E)
- Try
- R(A);
- Vars
- B(g);N_SPINB(g),OGATE,XB(I)::QAB(G),XB(g)
- B(i);OGATE,XS(E)::QAB(G)
- S(a);N_GUARD,XS(D)::QAB1(G),XP(d)
- P(f);N_GUARD,XS(E)::R1(H)
- B(g);OGATEB::B(I),XB(g)
- P(d);OGATE::QAR2(G),XP(b)
- S(a);N_GUARD::QAB1(G),XP(d)
- B(i);OGATE::QAB(G)
- Refutation
- P(b);XR(A)
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- P(d);OGATE::QAR2(G),XP(b)
- Refutation
- B(g);N_SPINB(g),XB(I)
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- B(g);N_SPINB(g),OGATE,XB(I)::QAR1(G),XP(f)
- P(d);OGATE::QAR2(G),XP(b)
- Refutation
- B(i);
- Try
- Actual
- B(B);
- Vars
- B(g);N_SPINB(g),OGATE,XB(I)::QAB(G),XB(g)
- B(i);SBLOCK,XS(E)::S(D)
- S(a);N_GUARD,XS(D)::QAB1(G),XP(d)
- P(f);OGATEB,SBLOCK,XB(B)::R(H)
- P(f);SBLOCK,XS(E)::S(D)
- B(g);OGATEB::B(I),XB(g)
- B(i);OGATE::QAB(G)
- S(a);N_GUARD::QAB1(G),XP(d)
- P(d);OGATE::QAR2(G),XP(b)
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).