MESON Chess Problem Database
Problem Display
PID: 10233 (1K6/2B1p3/p1k1P1R1/3b2p1/1PP1N3/5R2/1nQ3B1/8 w - - 0 1)
Lipton, Michael
4th Comm., Olympic Ty., 1962
#2
10 + 6
| 3174 | The Two-move Chess Problem Tradition and Development | 1966 |
SOLUTION
- SOUND
- Sets
- 1...Bxe4
- 2.Qxe4#
- 1...Sd1
- 2.Qa4#
- 1...Sd3
- 2.Qa4#
- 1...Sa4
- 2.Qxa4#
- 1...Sxc4
- 2.Qa4#
- 1...a5
- 2.b5#
- 1...Bxe4
- Tries
- 1.Sc3?
- threat
- 2.cxd5#
- 1...Bxf3
- 2.Bxf3#
- 1...Bxe6
- 2.Rd3#
- 1...Sxc4
- 2.Qa4#
- 1...Be4
- 2.Qxe4#
- 1...Bxc4!
- threat
- 1.Sxg5?
- 1...Bxf3
- 2.Bxf3#
- 1...Bxc4
- 2.Rf5#
- 1...Bxe6
- 2.Rd3#
- 1...Sxc4
- 2.Qa4#
- 1...Be4
- 2.Qxe4#
- 1...Sd1
- 2.Qa4#
- 1...Sd3
- 2.Qa4#
- 1...Sa4
- 2.Qxa4#
- 1...a5!
- 1...Bxf3
- 1.Rf1?
- 1...Bxc4
- 2.Sd6#
- 1...Bxe4
- 2.Bxe4#
- 2.Qxe4#
- 1...Bxe6
- 2.Sc5#
- 1...Sxc4
- 2.Qa4#
- 1...Sd1
- 2.Qa4#
- 1...Sd3
- 2.Qa4#
- 1...Sa4
- 2.Qxa4#
- 1...a5
- 2.b5#
- 1...g4!
- 1...Bxc4
- 1.Rf2?
- 1...Bxc4
- 2.Sd6#
- 1...Bxe4
- 2.Bxe4#
- 2.Qxe4#
- 1...Bxe6
- 2.Sc5#
- 1...Sxc4
- 2.Qa4#
- 1...Sd1
- 2.Qa4#
- 1...Sd3
- 2.Qa4#
- 1...Sa4
- 2.Qxa4#
- 1...a5
- 2.b5#
- 1...g4!
- 1...Bxc4
- 1.Rc3?
- 1...Bxc4
- 2.Sd6#
- 1...Bxe4
- 2.Bxe4#
- 2.Qxe4#
- 1...Bxe6
- 2.Sc5#
- 1...Sxc4
- 2.Qa4#
- 1...Sd1
- 2.Qa4#
- 1...Sd3
- 2.Qa4#
- 1...Sa4
- 2.Qxa4#
- 1...a5
- 2.b5#
- 1...g4!
- 1...Bxc4
- 1.Rd3?
- 1...Bxc4
- 2.Sd6#
- 1...Bxe4
- 2.Bxe4#
- 1...Bxe6
- 2.Sd2#
- 2.Sf2#
- 2.Sc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sxg5#
- 2.Rxe6#
- 1...Sxd3
- 2.Qa4#
- 1...Sxc4
- 2.Qa4#
- 1...Sd1
- 2.Qa4#
- 1...Sa4
- 2.Qxa4#
- 1...a5
- 2.b5#
- 1...g4!
- 1...Bxc4
- 1.Re3?
- 1...Bxc4
- 2.Sd6#
- 1...Bxe4
- 2.Bxe4#
- 2.Qxe4#
- 1...Bxe6
- 2.Sc5#
- 1...Sxc4
- 2.Qa4#
- 1...Sd1
- 2.Qa4#
- 1...Sd3
- 2.Qa4#
- 1...Sa4
- 2.Qxa4#
- 1...a5
- 2.b5#
- 1...g4!
- 1...Bxc4
- 1.Rg3?
- 1...Bxc4
- 2.Sd6#
- 1...Bxe4
- 2.Bxe4#
- 2.Qxe4#
- 1...Bxe6
- 2.Sc5#
- 1...Sxc4
- 2.Qa4#
- 1...Sd1
- 2.Qa4#
- 1...Sd3
- 2.Qa4#
- 1...Sa4
- 2.Qxa4#
- 1...a5
- 2.b5#
- 1...g4!
- 1...Bxc4
- 1.Rh3?
- 1...Bxc4
- 2.Sd6#
- 1...Bxe4
- 2.Bxe4#
- 2.Qxe4#
- 1...Bxe6
- 2.Sc5#
- 1...Sxc4
- 2.Qa4#
- 1...Sd1
- 2.Qa4#
- 1...Sd3
- 2.Qa4#
- 1...Sa4
- 2.Qxa4#
- 1...a5
- 2.b5#
- 1...g4!
- 1...Bxc4
- 1.Rf5?
- 1...Bxc4
- 2.Sd2#
- 2.Sf2#
- 2.Sg3#
- 2.Sxg5#
- 2.Sd6#
- 2.Sf6#
- 2.Rc5#
- 1...Bxe4
- 2.Bxe4#
- 2.Rc5#
- 2.Qxe4#
- 1...Bxe6
- 2.Sc5#
- 1...Sxc4
- 2.Qa4#
- 1...Sd1
- 2.Qa4#
- 1...Sd3
- 2.Qa4#
- 1...Sa4
- 2.Qxa4#
- 1...a5
- 2.b5#
- 1...g4!
- 1...Bxc4
- 1.Rf7?
- 1...Bxc4
- 2.Sd6#
- 1...Bxe4
- 2.Bxe4#
- 2.Qxe4#
- 1...Bxe6
- 2.Sc5#
- 1...Sxc4
- 2.Qa4#
- 1...Sd1
- 2.Qa4#
- 1...Sd3
- 2.Qa4#
- 1...Sa4
- 2.Qxa4#
- 1...a5
- 2.b5#
- 1...g4!
- 1...Bxc4
- 1.Rf8?
- 1...Bxc4
- 2.Sd6#
- 1...Bxe4
- 2.Bxe4#
- 2.Qxe4#
- 1...Bxe6
- 2.Sc5#
- 1...Sxc4
- 2.Qa4#
- 1...Sd1
- 2.Qa4#
- 1...Sd3
- 2.Qa4#
- 1...Sa4
- 2.Qxa4#
- 1...a5
- 2.b5#
- 1...g4!
- 1...Bxc4
- 1.Rxg5?
- 1...Bxc4
- 2.Rc5#
- 1...Bxe4
- 2.Rc5#
- 2.Qxe4#
- 1...Sxc4
- 2.Qa4#
- 1...Sd1
- 2.Qa4#
- 1...Sd3
- 2.Qa4#
- 1...Sa4
- 2.Qxa4#
- 1...a5
- 2.b5#
- 1...Bxe6!
- 1...Bxc4
- 1.Qd1?
- threat
- 2.Qxd5#
- 1...Bxc4
- 2.Qd7#
- 1...Bxe4
- 2.Qd7#
- 1...Bxe6
- 2.Rxe6#
- 2.Qd5#
- 1...Sxc4
- 2.Qa4#
- 1...Sd3
- 2.Qa4#
- 1...Sxd1!
- threat
- 1.Sc3?
- Keys
- 1.Ra3!
- threat
- 2.Rxa6#
- 1...Bxc4
- 2.Sd6#
- 1...Bxe6
- 2.Sc5#
- 1...Sxc4
- 2.Qa4#
- 1...Sa4
- 2.Qxa4#
- 1...a5
- 2.b5#
- threat
- 1.Ra3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 3
- Sets
- B(b);OGATE,XS(F)::QAB(A),XB(b)
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- S(a);N_GUARD,P_SPINS(a),XP(E)::QAB(A)
- P(d);N_GUARD::P(D)
- Tries
- Try
- S(F);
- Threat
- P(E),XB(b)
- Vars
- B(b);OGATE,P_SPINB(b),XR(C)::B(B),XB(b)
- B(b);OGATEB,P_SPINB(b),XP(G)::B(B)+R(C)
- S(a);N_GUARD,XP(E)::QAB(A)
- B(b);OGATEB::QAB(A),XB(b)
- Refutation
- B(b);XP(E)
- Try
- S(F);XP(c)
- Vars
- B(b);OGATE,P_SPINB(b),XR(C)::B(B),XB(b)
- B(b);OGATEB,P_SPINB(b),XP(E)::B(B)+R(C)
- B(b);OGATEB,P_SPINB(b),XP(G)::B(B)+R(C)
- S(a);N_GUARD,P_SPINS(a),XP(E)::QAB(A)
- B(b);OGATEB::QAB(A),XB(b)
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- Refutation
- P(d);
- Try
- R(C);
- Vars
- B(b);P_SPINB(b),XP(E)::B(B)+S(F)
- B(b);P_SPINB(b),XP(G)::B(B)+S(F)
- S(a);N_GUARD,P_SPINS(a),XP(E)::QAB(A)
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- P(d);N_GUARD::P(D)
- Refutation
- P(c);
- Try
- R(C);
- Vars
- B(b);P_SPINB(b),XP(E)::B(B)+S(F)
- B(b);P_SPINB(b),XP(G)::B(B)+S(F)
- S(a);N_GUARD,P_SPINS(a),XP(E)::QAB(A)
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- P(d);N_GUARD::P(D)
- Refutation
- P(c);
- Try
- R(C);
- Vars
- B(b);P_SPINB(b),XP(E)::B(B)+S(F)
- B(b);P_SPINB(b),XP(G)::B(B)+S(F)
- S(a);N_GUARD,P_SPINS(a),XP(E)::QAB(A)
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- P(d);N_GUARD::P(D)
- Refutation
- P(c);
- Try
- R(C);
- Vars
- B(b);P_SPINB(b),XP(E)::B(B)+S(F)
- B(b);OGATE,P_SPINB(b),XS(F)::B(B),XB(b)
- S(a);N_GUARD,XR(C)::QAB(A)
- S(a);N_GUARD,P_SPINS(a),XP(E)::QAB(A)
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- P(d);N_GUARD::P(D)
- Refutation
- P(c);
- Try
- R(C);
- Vars
- B(b);P_SPINB(b),XP(E)::B(B)+S(F)
- B(b);P_SPINB(b),XP(G)::B(B)+S(F)
- S(a);N_GUARD,P_SPINS(a),XP(E)::QAB(A)
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- P(d);N_GUARD::P(D)
- Refutation
- P(c);
- Try
- R(C);
- Vars
- B(b);P_SPINB(b),XP(E)::B(B)+S(F)
- B(b);P_SPINB(b),XP(G)::B(B)+S(F)
- S(a);N_GUARD,P_SPINS(a),XP(E)::QAB(A)
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- P(d);N_GUARD::P(D)
- Refutation
- P(c);
- Try
- R(C);
- Vars
- B(b);P_SPINB(b),XP(E)::B(B)+S(F)
- B(b);P_SPINB(b),XP(G)::B(B)+S(F)
- S(a);N_GUARD,P_SPINS(a),XP(E)::QAB(A)
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- P(d);N_GUARD::P(D)
- Refutation
- P(c);
- Try
- R(C);
- Vars
- B(b);P_SPINB(b),XP(G)::B(B)+S(F)
- S(a);N_GUARD,P_SPINS(a),XP(E)::QAB(A)
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- P(d);N_GUARD::P(D)
- Refutation
- P(c);
- Try
- R(C);
- Vars
- B(b);P_SPINB(b),XP(E)::B(B)+S(F)
- B(b);P_SPINB(b),XP(G)::B(B)+S(F)
- S(a);N_GUARD,P_SPINS(a),XP(E)::QAB(A)
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- P(d);N_GUARD::P(D)
- Refutation
- P(c);
- Try
- R(C);
- Vars
- B(b);P_SPINB(b),XP(E)::B(B)+S(F)
- B(b);P_SPINB(b),XP(G)::B(B)+S(F)
- S(a);N_GUARD,P_SPINS(a),XP(E)::QAB(A)
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- P(d);N_GUARD::P(D)
- Refutation
- P(c);
- Try
- R(H);XP(c)
- Vars
- B(b);OGATE,P_SPINB(b),XP(E)::R1(H)
- S(a);N_GUARD,P_SPINS(a),XP(E)::QAB(A)
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- P(d);N_GUARD::P(D)
- Refutation
- B(b);XP(G)
- Try
- Q(A);
- Threat
- QAB1(A),XB(b)
- Vars
- B(b);OGATE,XP(E)::QAB1(A)
- B(b);OGATE,XS(F)::QAB1(A)
- S(a);N_GUARD,XP(E)::QAB(A)
- S(a);N_GUARD::QAB(A)
- Refutation
- S(a);XQ(A)
- Try
- Actual
- R(C);
- Threat
- R(C),XP(d)
- Vars
- B(b);P_SPINB(b),XP(E)::B(B)+S(F)
- B(b);P_SPINB(b),XP(G)::B(B)+S(F)
- S(a);N_GUARD,P_SPINS(a),XP(E)::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- P(d);N_GUARD::P(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).