MESON Chess Problem Database
Problem Display
PID: 64501 (6K1/3n4/3P4/5p2/2BBkpN1/1N2bp2/8/5RnQ w - - 0 1)
Peake, JL
Chess, 1947
#2
8 + 7
SOLUTION
- SOUND
- Sets
- 1...Bc1
- 2.Sf2#
- 1...Bd2
- 2.Sf2#
- 1...Bf2
- 2.Sxf2#
- 1...Bxd4
- 2.Sd2#
- 1...Se2
- 2.Qxf3#
- 1...Sh3
- 2.Qxf3#
- 1...Sc5
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sf6+
- 2.Sxf6#
- 1...Sb8
- 2.Sf6#
- 1...Sf8
- 2.Sf6#
- 1...fxg4
- 2.Qh7#
- 1...Bc1
- Tries
- 1.Kf7?
- 1...Bxd4
- 2.Sd2#
- 1...fxg4
- 2.Qh7#
- 1...Bc1
- 2.Sf2#
- 1...Bd2
- 2.Sf2#
- 1...Bf2
- 2.Sxf2#
- 1...Se2
- 2.Qxf3#
- 1...Sh3
- 2.Qxf3#
- 1...Sc5
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sb8
- 2.Sf6#
- 1...Sf8
- 2.Sf6#
- 1...Se5+!
- 1...Bxd4
- 1.Kg7?
- 1...fxg4
- 2.Qh7#
- 1...Bc1
- 2.Sf2#
- 1...Bd2
- 2.Sf2#
- 1...Bf2
- 2.Sxf2#
- 1...Se2
- 2.Qxf3#
- 1...Sh3
- 2.Qxf3#
- 1...Sc5
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sb8
- 2.Sf6#
- 1...Sf8
- 2.Sf6#
- 1...Bxd4+!
- 1...fxg4
- 1.Kh8?
- 1...fxg4
- 2.Qh7#
- 1...Bc1
- 2.Sf2#
- 1...Bd2
- 2.Sf2#
- 1...Bf2
- 2.Sxf2#
- 1...Se2
- 2.Qxf3#
- 1...Sh3
- 2.Qxf3#
- 1...Sc5
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sb8
- 2.Sf6#
- 1...Sf8
- 2.Sf6#
- 1...Bxd4+!
- 1...fxg4
- 1.Ba1?
- 1...Sf6+
- 2.Sxf6#
- 1...fxg4
- 2.Qh7#
- 1...Bd2
- 2.Sxd2#
- 1...Bf2
- 2.Sd2#
- 1...Bd4
- 2.Sd2#
- 1...Bc5
- 2.Sd2#
- 1...Bb6
- 2.Sd2#
- 1...Ba7
- 2.Sd2#
- 1...Se2
- 2.Qxf3#
- 1...Sh3
- 2.Qxf3#
- 1...Sc5
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sb8
- 2.Sf6#
- 1...Sf8
- 2.Sf6#
- 1...Bc1!
- 1...Sf6+
- 1.Bb2?
- 1...Sf6+
- 2.Sxf6#
- 1...fxg4
- 2.Qh7#
- 1...Bd2
- 2.Sxd2#
- 1...Bf2
- 2.Sd2#
- 1...Bd4
- 2.Sd2#
- 1...Bc5
- 2.Sd2#
- 1...Bb6
- 2.Sd2#
- 1...Ba7
- 2.Sd2#
- 1...Se2
- 2.Qxf3#
- 1...Sh3
- 2.Qxf3#
- 1...Sc5
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sb8
- 2.Sf6#
- 1...Sf8
- 2.Sf6#
- 1...Bc1!
- 1...Sf6+
- 1.Bc3?
- 1...Sf6+
- 2.Sxf6#
- 1...fxg4
- 2.Qh7#
- 1...Bd2
- 2.Sxd2#
- 1...Bf2
- 2.Sd2#
- 1...Bd4
- 2.Sd2#
- 1...Bc5
- 2.Sd2#
- 1...Bb6
- 2.Sd2#
- 1...Ba7
- 2.Sd2#
- 1...Se2
- 2.Qxf3#
- 1...Sh3
- 2.Qxf3#
- 1...Sc5
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sb8
- 2.Sf6#
- 1...Sf8
- 2.Sf6#
- 1...Bc1!
- 1...Sf6+
- 1.Rxg1?
- 1...Sf6+
- 2.Sxf6#
- 1...Bxd4
- 2.Sd2#
- 1...fxg4
- 2.Qh7#
- 1...Bc1
- 2.Sf2#
- 1...Bd2
- 2.Sf2#
- 1...Bf2
- 2.Sxf2#
- 1...Sc5
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sb8
- 2.Sf6#
- 1...Sf8
- 2.Sf6#
- 1...Bxg1!
- 1...Sf6+
- 1.Rxf3?
- threat
- 2.Rxe3#
- 1...Sf6+
- 2.Sxf6#
- 1...Bxd4
- 2.Sd2#
- 2.Re3#
- 1...Sxf3
- 2.Qb1#
- 1...Bc1
- 2.Sf2#
- 2.Re3#
- 1...Bd2
- 2.Sf2#
- 2.Re3#
- 1...Bf2
- 2.Sxf2#
- 2.Re3#
- 1...fxg4!
- threat
- 1.Qg2?
- threat
- 2.Qc2#
- 1...Sf6+
- 2.Sxf6#
- 1...Bd2
- 2.Sf2#
- 1...Bf2
- 2.Sxf2#
- 1...Se2
- 2.Qxf3#
- 1...Sc5
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...fxg2!
- threat
- 1.Kf7?
- Keys
- 1.Ra1!
- 1...Sf6+
- 2.Sxf6#
- 1...Bxd4
- 2.Sd2#
- 1...fxg4
- 2.Qh7#
- 1...Bc1
- 2.Sf2#
- 1...Bd2
- 2.Sf2#
- 1...Bf2
- 2.Sxf2#
- 1...Se2
- 2.Qb1#
- 1...Sh3
- 2.Qb1#
- 1...Sc5
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sb8
- 2.Sf6#
- 1...Sf8
- 2.Sf6#
- 1...Sf6+
- 1.Ra1!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- B(b);N_GUARD::S(F)
- B(b);N_GUARD::S(F),XB(b)
- B(b);N_GUARD,SBLOCK,XB(E)::S(C)
- S(a);N_GUARD::QAB1(B),XP(c)
- S(g);N_GUARD::S(F)
- S(g);CHECK,N_GUARD::S(F),XS(g)
- P(f);OGATEB,XS(F)::QAB(B)
- Tries
- Try
- K(H);S_FLIGHT
- Vars
- B(b);N_GUARD,SBLOCK,XB(E)::S(C)
- P(f);OGATEB,XS(F)::QAB(B)
- B(b);N_GUARD::S(F)
- B(b);N_GUARD::S(F),XB(b)
- S(a);N_GUARD::QAB1(B),XP(c)
- S(g);N_GUARD::S(F)
- S(g);N_GUARD::S(F),XS(g)
- Refutation
- S(g);CHECK
- Try
- K(H);P-FLIGHT
- Vars
- P(f);OGATEB,XS(F)::QAB(B)
- B(b);N_GUARD::S(F)
- B(b);N_GUARD::S(F),XB(b)
- S(a);N_GUARD::QAB1(B),XP(c)
- S(g);N_GUARD::S(F)
- S(g);N_GUARD::S(F),XS(g)
- Refutation
- B(b);CHECK,XB(E)
- Try
- K(H);P-FLIGHT
- Vars
- P(f);OGATEB,XS(F)::QAB(B)
- B(b);N_GUARD::S(F)
- B(b);N_GUARD::S(F),XB(b)
- S(a);N_GUARD::QAB1(B),XP(c)
- S(g);N_GUARD::S(F)
- S(g);N_GUARD::S(F),XS(g)
- Refutation
- B(b);CHECK,XB(E)
- Try
- B(E);
- Vars
- S(g);CHECK,N_GUARD::S(F),XS(g)
- P(f);OGATEB,XS(F)::QAB(B)
- B(b);N_GUARD::S(C),XB(b)
- B(b);N_GUARD::S(C)
- S(a);N_GUARD::QAB1(B),XP(c)
- S(g);N_GUARD::S(F)
- Refutation
- B(b);
- Try
- B(E);
- Vars
- S(g);CHECK,N_GUARD::S(F),XS(g)
- P(f);OGATEB,XS(F)::QAB(B)
- B(b);N_GUARD::S(C),XB(b)
- B(b);N_GUARD::S(C)
- S(a);N_GUARD::QAB1(B),XP(c)
- S(g);N_GUARD::S(F)
- Refutation
- B(b);
- Try
- B(E);
- Vars
- S(g);CHECK,N_GUARD::S(F),XS(g)
- P(f);OGATEB,XS(F)::QAB(B)
- B(b);N_GUARD::S(C),XB(b)
- B(b);N_GUARD::S(C)
- S(a);N_GUARD::QAB1(B),XP(c)
- S(g);N_GUARD::S(F)
- Refutation
- B(b);
- Try
- R(A);XS(a)
- Vars
- S(g);CHECK,N_GUARD::S(F),XS(g)
- B(b);N_GUARD,SBLOCK,XB(E)::S(C)
- P(f);OGATEB,XS(F)::QAB(B)
- B(b);N_GUARD::S(F)
- B(b);N_GUARD::S(F),XB(b)
- S(g);N_GUARD::S(F)
- Refutation
- B(b);XR(A)
- Try
- R(A);XP(c)
- Threat
- QAB(B)+R(A),DCHECK,XB(b)
- Vars
- S(g);CHECK,N_GUARD::S(F),XS(g)
- S(a);OGATE,P_SPINS(a),SBLOCK,XR(A)::QAB(B)
- Refutation
- P(f);XS(F)
- Try
- Q(B);
- Threat
- QAB(B)
- Vars
- S(g);CHECK,N_GUARD::S(F),XS(g)
- B(b);N_GUARD::S(F)
- B(b);N_GUARD::S(F),XB(b)
- S(a);N_GUARD::QAB1(B),XP(c)
- S(g);N_GUARD::S(F)
- Refutation
- P(c);N_SPINP(c),XQ(B)
- Try
- Actual
- R(A);
- Vars
- S(g);CHECK,N_GUARD::S(F),XS(g)
- B(b);N_GUARD,SBLOCK,XB(E)::S(C)
- P(f);OGATEB,XS(F)::QAB(B)
- B(b);N_GUARD::S(F)
- B(b);N_GUARD::S(F),XB(b)
- S(a);OGATE::QAB(B)
- S(g);N_GUARD::S(F)
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).