MESON Chess Problem Database
Problem Display
PID: 18743 (4QK2/8/8/p7/pkP1N3/1n1RP3/B7/3N4 w - - 0 1)
Burger, Robert Eugene
1st Prize, American Chess Bulletin, 1958
#2
8 + 4
| 3976 | FIDE Album (1956-1958) | 1961 |
| 3147 | Chess Problems: Introduction to an Art | 1963 |
| 3310 | 2345 Chess Problems | 1997 |
SOLUTION
- SOUND
- Sets
- 1...Kxc4
- 2.Rd4#
- 1...Sa1
- 2.Qb5#
- 2.Qe7#
- 2.Qb8#
- 1...Sc1
- 2.Qb5#
- 2.Qe7#
- 2.Qb8#
- 1...Sd2
- 2.Qb5#
- 2.Qe7#
- 2.Qb8#
- 1...Sd4
- 2.Qe7#
- 1...Sc5
- 2.Qb5#
- 1...a3
- 2.Qb5#
- 1...Kxc4
- Tries
- 1.Kf7?
- 1...Kxc4
- 2.Rd4#
- 1...Sa1
- 2.Qb5#
- 2.Qe7#
- 2.Qb8#
- 2.Qf8#
- 1...Sc1
- 2.Qb5#
- 2.Qe7#
- 2.Qb8#
- 2.Qf8#
- 1...Sd2
- 2.Qb5#
- 2.Qe7#
- 2.Qb8#
- 2.Qf8#
- 1...Sd4
- 2.Qe7#
- 2.Qf8#
- 1...Sc5
- 2.Qb5#
- 1...a3
- 2.Qb5#
- 1...Ka3!
- 1...Kxc4
- 1.Kg7?
- 1...Kxc4
- 2.Rd4#
- 1...Sa1
- 2.Qb5#
- 2.Qe7#
- 2.Qb8#
- 2.Qf8#
- 1...Sc1
- 2.Qb5#
- 2.Qe7#
- 2.Qb8#
- 2.Qf8#
- 1...Sd2
- 2.Qb5#
- 2.Qe7#
- 2.Qb8#
- 2.Qf8#
- 1...Sd4
- 2.Qe7#
- 2.Qf8#
- 1...Sc5
- 2.Qb5#
- 1...a3
- 2.Qb5#
- 1...Ka3!
- 1...Kxc4
- 1.Kg8?
- 1...Kxc4
- 2.Rd4#
- 1...Sa1
- 2.Qb5#
- 2.Qe7#
- 2.Qb8#
- 2.Qf8#
- 1...Sc1
- 2.Qb5#
- 2.Qe7#
- 2.Qb8#
- 2.Qf8#
- 1...Sd2
- 2.Qb5#
- 2.Qe7#
- 2.Qb8#
- 2.Qf8#
- 1...Sd4
- 2.Qe7#
- 2.Qf8#
- 1...Sc5
- 2.Qb5#
- 1...a3
- 2.Qb5#
- 1...Ka3!
- 1...Kxc4
- 1.Sb2?
- threat
- 2.Qxa4#
- 1...Sc5
- 2.Qb5#
- 1...a3
- 2.Rxb3#
- 2.Qa4#
- 2.Qb5#
- 2.Qb8#
- 1...Ka3!
- threat
- 1.Sdf2?
- 1...Kxc4
- 2.Rd4#
- 2.Qxa4#
- 1...Sa1
- 2.Qb5#
- 2.Qe7#
- 2.Qb8#
- 1...Sc1
- 2.Qb5#
- 2.Qe7#
- 2.Qb8#
- 1...Sd2
- 2.Qb5#
- 2.Qe7#
- 2.Qb8#
- 1...Sd4
- 2.Qe7#
- 1...Sc5
- 2.Qb5#
- 1...a3
- 2.Qb5#
- 1...Ka3!
- 1...Kxc4
- 1.Sdc3?
- threat
- 2.Qxa4#
- 1...Kxc4
- 2.Rd4#
- 2.Qb5#
- 1...Sc5
- 2.Sd5#
- 1...a3
- 2.Qa4#
- 2.Qb5#
- 1...Ka3!
- threat
- 1.Sd2?
- 1...Kc5
- 2.Qb5#
- 1...Sxd2
- 2.Qb5#
- 2.Qe7#
- 1...Sa1
- 2.Qb5#
- 2.Qe7#
- 1...Sc1
- 2.Qb5#
- 2.Qe7#
- 1...Sd4
- 2.Qe7#
- 1...Sc5
- 2.Qb5#
- 1...a3
- 2.Qb5#
- 1...Ka3!
- 1...Kc5
- 1.Sc5?
- 1...Ka3
- 2.Qxa4#
- 1...Kxc5
- 2.Qb5#
- 1...Sxc5
- 2.Qb5#
- 1...Sa1
- 2.Sa6#
- 2.Qb5#
- 1...Sc1
- 2.Sa6#
- 2.Qb5#
- 1...Sd2
- 2.Sa6#
- 2.Qb5#
- 1...Sd4
- 2.Sa6#
- 1...a3
- 2.Qb5#
- 1...Kxc4!
- 1...Ka3
- 1.Bb1?
- 1...Ka3
- 2.Qe7#
- 1...Kxc4
- 2.Qxa4#
- 1...Sa1
- 2.Qb5#
- 1...Sc1
- 2.Qb5#
- 1...Sd2
- 2.Qb5#
- 1...Sc5
- 2.Qb5#
- 1...a3
- 2.Qb5#
- 1...Sd4!
- 1...Ka3
- 1.Bxb3?
- threat
- 2.Qxa4#
- 2.Qe7#
- 1...Ka3
- 2.Qxa4#
- 2.Qe7#
- 1...a3
- 2.Qa4#
- 2.Qb5#
- 2.Qe7#
- 2.Qb8#
- 1...axb3!
- threat
- 1.Rxb3+?
- 1...Kxc4
- 2.Qb5#
- 2.Qc6#
- 2.Qf7#
- 2.Qe6#
- 1...axb3!
- 1...Kxc4
- 1.Rc3?
- 1...Sd4
- 2.Qe7#
- 1...Sa1
- 2.Qb5#
- 2.Qe7#
- 2.Qb8#
- 1...Sc1
- 2.Qb5#
- 2.Qe7#
- 2.Qb8#
- 1...Sd2
- 2.Qb5#
- 2.Qe7#
- 2.Qb8#
- 1...Sc5
- 2.Qb5#
- 1...a3
- 2.Qb5#
- 1...Ka3!
- 1...Sd4
- 1.Qh5?
- 1...Kxc4
- 2.Rd4#
- 1...Sc5
- 2.Qxc5#
- 1...Sa1
- 2.Qb5#
- 2.Qc5#
- 1...Sc1
- 2.Qb5#
- 2.Qc5#
- 1...Sd2
- 2.Qb5#
- 2.Qc5#
- 1...Sd4
- 2.Qc5#
- 1...a3
- 2.Qb5#
- 1...Ka3!
- 1...Kxc4
- 1.Qc6?
- 1...Sc5
- 2.Qb5#
- 2.Qxc5#
- 2.Qb6#
- 1...Sa1
- 2.Qb5#
- 2.Qb7#
- 2.Qc5#
- 2.Qb6#
- 2.Qd6#
- 1...Sc1
- 2.Qb5#
- 2.Qb7#
- 2.Qc5#
- 2.Qb6#
- 2.Qd6#
- 1...Sd2
- 2.Qb5#
- 2.Qb7#
- 2.Qc5#
- 2.Qb6#
- 2.Qd6#
- 1...Sd4
- 2.Qc5#
- 2.Qd6#
- 1...a3
- 2.Rxb3#
- 2.Qb5#
- 1...Ka3!
- 1...Sc5
- 1.Qd7?
- 1...Kxc4
- 2.Rd4#
- 1...Sc5
- 2.Qb5#
- 1...Sa1
- 2.Qb5#
- 2.Qd6#
- 2.Qb7#
- 2.Qe7#
- 1...Sc1
- 2.Qb5#
- 2.Qd6#
- 2.Qb7#
- 2.Qe7#
- 1...Sd2
- 2.Qb5#
- 2.Qd6#
- 2.Qb7#
- 2.Qe7#
- 1...Sd4
- 2.Qd6#
- 2.Qe7#
- 1...a3
- 2.Qb5#
- 1...Ka3!
- 1...Kxc4
- 1.Qe5?
- 1...Kxc4
- 2.Rd4#
- 1...Sc5
- 2.Qc3#
- 2.Qxc5#
- 1...Sa1
- 2.Qc3#
- 2.Qd6#
- 2.Qb8#
- 2.Qb5#
- 2.Qc5#
- 2.Qe7#
- 1...Sc1
- 2.Qc3#
- 2.Qd6#
- 2.Qb8#
- 2.Qb5#
- 2.Qc5#
- 2.Qe7#
- 1...Sd2
- 2.Qc3#
- 2.Qd6#
- 2.Qb8#
- 2.Qb5#
- 2.Qc5#
- 2.Qe7#
- 1...Sd4
- 2.Qd6#
- 2.Qc5#
- 2.Qe7#
- 1...a3
- 2.Qb5#
- 1...Ka3!
- 1...Kxc4
- 1.Qe7+?
- 1...Sc5
- 2.Qxc5#
- 1...Kxc4!
- 1...Sc5
- 1.Qb8+?
- 1...Kxc4
- 2.Sb2#
- 2.Rd4#
- 1...Ka3!
- 1...Kxc4
- 1.Kf7?
- Keys
- 1.Sec3!
- 1...Ka3
- 2.Qxa4#
- 1...Kxc4
- 2.Qb5#
- 1...Kc5
- 2.Qb5#
- 1...Sa1
- 2.Qe7#
- 1...Sc1
- 2.Qe7#
- 1...Sd2
- 2.Qe7#
- 1...Sd4
- 2.Qe7#
- 1...Sc5
- 2.Sd5#
- 1...a3
- 2.Qb5#
- 1...Ka3
- 1.Sec3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 2
- ADDED MATES = 5
- REMOVED MATES = 0
- Sets
- K(c);OGATEB,P-FLIGHT,P_SPINS(a),XP(E)::R1(C)
- S(a);N_GUARD::QAB(G)
- S(a);::QAR1(G)
- P(b);SBLOCK::QAR1(G)
- Tries
- Try
- K(H);P-FLIGHT
- Vars
- K(c);OGATEB,P-FLIGHT,P_SPINS(a),XP(E)::R1(C)
- S(a);::QAR1(G)
- P(b);SBLOCK::QAR1(G)
- Refutation
- K(c);P_SPINS(a),S_FLIGHT
- Try
- K(H);S_FLIGHT
- Vars
- K(c);OGATEB,P-FLIGHT,P_SPINS(a),XP(E)::R1(C)
- S(a);::QAR1(G)
- P(b);SBLOCK::QAR1(G)
- Refutation
- K(c);P_SPINS(a),S_FLIGHT
- Try
- K(H);P-FLIGHT
- Vars
- K(c);OGATEB,P-FLIGHT,P_SPINS(a),XP(E)::R1(C)
- S(a);::QAR1(G)
- P(b);SBLOCK::QAR1(G)
- Refutation
- K(c);P_SPINS(a),S_FLIGHT
- Try
- S(A);
- Threat
- QAR1(G),XP(b)
- Vars
- S(a);::QAR1(G)
- Refutation
- K(c);P_SPINS(a),S_FLIGHT
- Try
- S(A);
- Vars
- S(a);N_GUARD::QAB(G)
- S(a);::QAR1(G)
- P(b);SBLOCK::QAR1(G)
- Refutation
- K(c);P_SPINS(a),S_FLIGHT
- Try
- S(A);
- Threat
- QAR1(G),XP(b)
- Vars
- S(a);::S(A)
- Refutation
- K(c);S_FLIGHT
- Try
- S(F);
- Vars
- K(c);S_FLIGHT::QAR1(G)
- S(a);N_GUARD::QAB(G)
- S(a);::QAR1(G)
- P(b);SBLOCK::QAR1(G)
- Refutation
- K(c);P_SPINS(a),S_FLIGHT
- Try
- S(F);
- Vars
- K(c);P_SPINS(a),S_FLIGHT::QAR1(G),XP(b)
- K(c);S_FLIGHT,XS(F)::QAR1(G)
- S(a);XS(F)::QAR1(G)
- S(a);::S(F)
- P(b);SBLOCK::QAR1(G)
- Refutation
- K(c);P-FLIGHT,P_SPINS(a),XP(E)
- Try
- B(B);
- Vars
- K(c);P_SPINS(a),S_FLIGHT::QAB(G)
- K(c);P-FLIGHT,XP(E)::QAR2(G),XP(b)
- S(a);::QAR1(G)
- P(b);SBLOCK::QAR1(G)
- Refutation
- S(a);
- Try
- B(B);XS(a)
- Threat
- DUALS(2)
- Refutation
- P(b);XB(B)
- Try
- R(C);CHECK,XS(a)
- Refutation
- P(b);XR(C)
- Try
- R(C);
- Vars
- S(a);N_GUARD::QAB(G)
- S(a);::QAR1(G)
- P(b);SBLOCK::QAR1(G)
- Refutation
- K(c);P_SPINS(a),S_FLIGHT
- Try
- Q(G);
- Vars
- K(c);OGATEB,P-FLIGHT,P_SPINS(a),XP(E)::R1(C)
- S(a);N_GUARD::QAB1(G),XS(a)
- S(a);N_GUARD::QAB1(G)
- P(b);SBLOCK::QAR1(G)
- Refutation
- K(c);P_SPINS(a),S_FLIGHT
- Try
- Q(G);
- Refutation
- K(c);P_SPINS(a),S_FLIGHT
- Try
- Q(G);
- Vars
- K(c);OGATEB,P-FLIGHT,P_SPINS(a),XP(E)::R1(C)
- S(a);::QAR1(G)
- P(b);SBLOCK::QAR1(G)
- Refutation
- K(c);P_SPINS(a),S_FLIGHT
- Try
- Q(G);
- Vars
- K(c);OGATEB,P-FLIGHT,P_SPINS(a),XP(E)::R1(C)
- P(b);SBLOCK::QAR1(G)
- Refutation
- K(c);P_SPINS(a),S_FLIGHT
- Try
- Q(G);CHECK
- Vars
- S(a);N_GUARD,P_SPINS(a)::QAB1(G),XS(a)
- Refutation
- K(c);P-FLIGHT,P_SPINS(a),XP(E)
- Try
- Q(G);CHECK
- Refutation
- K(c);P_SPINS(a),S_FLIGHT
- Try
- Actual
- S(F);
- Vars
- K(c);S_FLIGHT::QAR1(G),XP(b)
- K(c);P-FLIGHT,P_SPINS(a),XP(E)::QAB1(G)
- K(c);S_FLIGHT::QAR1(G)
- S(a);N_GUARD::QAB(G)
- S(a);SBLOCK::S(F)
- P(b);SBLOCK::QAR1(G)
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).