MESON Chess Problem Database
Problem Display
PID: 227684 (Q7/8/8/8/4p3/5p1K/8/R5qk w - - 0 1)
Merenyi, Lajos
Magyar Sakkvilag, 1926
#2
3 + 4
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qxa1
- 2.Qxa1#
- 1...Qb1
- 2.Rxb1#
- 1...Qc1
- 2.Rxc1#
- 1...Qd1
- 2.Rxd1#
- 1...Qe1
- 2.Rxe1#
- 1...Qf1+
- 2.Rxf1#
- 1...f2
- 2.Qxe4#
- 1...e3
- 2.Qxf3#
- 1...Qxa1
- Tries
- 1.Rb1?
- 1...Qf1+
- 2.Rxf1#
- 1...Qc1
- 2.Rxc1#
- 1...Qd1
- 2.Rxd1#
- 1...Qe1
- 2.Rxe1#
- 1...f2
- 2.Qxe4#
- 1...e3
- 2.Qxf3#
- 1...Qxb1!
- 1...Qf1+
- 1.Rc1?
- 1...Qf1+
- 2.Rxf1#
- 1...Qd1
- 2.Rxd1#
- 1...Qe1
- 2.Rxe1#
- 1...f2
- 2.Qxe4#
- 1...e3
- 2.Qxf3#
- 1...Qxc1!
- 1...Qf1+
- 1.Rd1?
- 1...Qf1+
- 2.Rxf1#
- 1...Qe1
- 2.Rxe1#
- 1...f2
- 2.Qxe4#
- 1...e3
- 2.Qxf3#
- 1...Qxd1!
- 1...Qf1+
- 1.Re1?
- 1...Qf1+
- 2.Rxf1#
- 1...f2
- 2.Qxe4#
- 1...e3
- 2.Qxf3#
- 1...Qxe1!
- 1...Qf1+
- 1.Rf1?
- 1...f2
- 2.Qxe4#
- 1...e3
- 2.Qxf3#
- 1...Qxf1+!
- 1...f2
- 1.Qxe4?
- threat
- 2.Qxf3#
- 1...Qf1+
- 2.Rxf1#
- 1...Qb1
- 2.Rxb1#
- 2.Qxb1#
- 1...Qc1
- 2.Rxc1#
- 1...Qd1
- 2.Rxd1#
- 1...Qe1
- 2.Rxe1#
- 2.Qxe1#
- 1...Qxa1!
- threat
- 1.Qd5?
- 1...Qf1+
- 2.Rxf1#
- 1...Qb1
- 2.Rxb1#
- 1...Qc1
- 2.Rxc1#
- 1...Qd1
- 2.Rxd1#
- 2.Qxd1#
- 1...Qe1
- 2.Rxe1#
- 1...f2
- 2.Qxe4#
- 1...e3
- 2.Qxf3#
- 1...Qxa1!
- 1...Qf1+
- 1.Qc6?
- 1...Qf1+
- 2.Rxf1#
- 1...Qb1
- 2.Rxb1#
- 1...Qc1
- 2.Rxc1#
- 2.Qxc1#
- 1...Qd1
- 2.Rxd1#
- 1...Qe1
- 2.Rxe1#
- 1...f2
- 2.Qxe4#
- 1...e3
- 2.Qxf3#
- 1...Qxa1!
- 1...Qf1+
- 1.Qb7?
- 1...Qf1+
- 2.Rxf1#
- 1...Qb1
- 2.Rxb1#
- 2.Qxb1#
- 1...Qc1
- 2.Rxc1#
- 1...Qd1
- 2.Rxd1#
- 1...Qe1
- 2.Rxe1#
- 1...f2
- 2.Qxe4#
- 1...e3
- 2.Qxf3#
- 1...Qxa1!
- 1...Qf1+
- 1.Qa2?
- threat
- 2.Qh2#
- 1...Qf1+
- 2.Rxf1#
- 1...f2!
- threat
- 1.Qa4?
- 1...Qf1+
- 2.Rxf1#
- 1...Qxa1
- 2.Qxa1#
- 1...Qb1
- 2.Rxb1#
- 1...Qc1
- 2.Rxc1#
- 1...Qd1
- 2.Rxd1#
- 2.Qxd1#
- 1...Qe1
- 2.Rxe1#
- 1...f2
- 2.Qxe4#
- 1...e3!
- 1...Qf1+
- 1.Qg8?
- threat
- 2.Rxg1#
- 2.Qxg1#
- 1...Qf1+
- 2.Rxf1#
- 1...f2
- 2.Qg2#
- 1...Qb1
- 2.Rxb1#
- 1...Qc1
- 2.Rxc1#
- 1...Qd1
- 2.Rxd1#
- 1...Qe1
- 2.Rxe1#
- 1...Qxa1!
- threat
- 1.Rb1?
- Keys
- 1.Qb8!
- threat
- 2.Qh2#
- 1...Qf1+
- 2.Rxf1#
- threat
- 1.Qb8!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 7
- Sets
- Q(a);N_SPINQ(a),OGATE,XR(A)::QAB1(C),XQ(a)
- Q(a);OGATEB::R(A),XQ(a)
- Q(a);CHECK,OGATEB::R(A),XQ(a)
- P(c);OGATEB,P_SPINP(d)::QAB(C),XP(d)
- P(d);OGATE,P_SPINP(c)::QAB(C),XP(c)
- Tries
- Try
- R(A);
- Vars
- Q(a);CHECK,OGATEB::R(A),XQ(a)
- Q(a);OGATEB::R(A),XQ(a)
- P(c);OGATEB,P_SPINP(d)::QAB(C),XP(d)
- P(d);OGATE,P_SPINP(c)::QAB(C),XP(c)
- Refutation
- Q(a);N_SPINQ(a),XR(A)
- Try
- R(A);
- Vars
- Q(a);CHECK,OGATEB::R(A),XQ(a)
- Q(a);OGATEB::R(A),XQ(a)
- P(c);OGATEB,P_SPINP(d)::QAB(C),XP(d)
- P(d);OGATE,P_SPINP(c)::QAB(C),XP(c)
- Refutation
- Q(a);N_SPINQ(a),XR(A)
- Try
- R(A);
- Vars
- Q(a);CHECK,OGATEB::R(A),XQ(a)
- Q(a);OGATEB::R(A),XQ(a)
- P(c);OGATEB,P_SPINP(d)::QAB(C),XP(d)
- P(d);OGATE,P_SPINP(c)::QAB(C),XP(c)
- Refutation
- Q(a);N_SPINQ(a),XR(A)
- Try
- R(A);
- Vars
- Q(a);CHECK,OGATEB::R(A),XQ(a)
- P(c);OGATEB,P_SPINP(d)::QAB(C),XP(d)
- P(d);OGATE,P_SPINP(c)::QAB(C),XP(c)
- Refutation
- Q(a);N_SPINQ(a),XR(A)
- Try
- R(A);
- Vars
- P(c);OGATEB,P_SPINP(d)::QAB(C),XP(d)
- P(d);OGATE,P_SPINP(c)::QAB(C),XP(c)
- Refutation
- Q(a);CHECK,N_SPINQ(a),XR(A)
- Try
- Q(C);P_PINP(c),XP(d)
- Threat
- QAB(C),XP(c)
- Vars
- Q(a);CHECK,OGATEB::R(A),XQ(a)
- Q(a);OGATEB::R(A),XQ(a)
- Refutation
- Q(a);N_SPINQ(a),XR(A)
- Try
- Q(C);
- Vars
- Q(a);CHECK,OGATEB::R(A),XQ(a)
- Q(a);OGATEB::R(A),XQ(a)
- P(c);OGATEB,P_SPINP(d)::QAB(C),XP(d)
- P(d);OGATE,P_SPINP(c)::QAB(C),XP(c)
- Refutation
- Q(a);N_SPINQ(a),XR(A)
- Try
- Q(C);
- Vars
- Q(a);CHECK,OGATEB::R(A),XQ(a)
- Q(a);OGATEB::R(A),XQ(a)
- P(c);OGATEB,P_SPINP(d)::QAB(C),XP(d)
- P(d);OGATE,P_SPINP(c)::QAB(C),XP(c)
- Refutation
- Q(a);N_SPINQ(a),XR(A)
- Try
- Q(C);
- Vars
- Q(a);CHECK,OGATEB::R(A),XQ(a)
- Q(a);OGATEB::R(A),XQ(a)
- P(c);OGATEB,P_SPINP(d)::QAB(C),XP(d)
- P(d);OGATE,P_SPINP(c)::QAB(C),XP(c)
- Refutation
- Q(a);N_SPINQ(a),XR(A)
- Try
- Q(C);
- Threat
- QAR1(C)
- Vars
- Q(a);CHECK,OGATEB::R(A),XQ(a)
- Refutation
- P(c);
- Try
- Q(C);
- Vars
- Q(a);CHECK,OGATEB::R(A),XQ(a)
- Q(a);N_SPINQ(a),OGATE,XR(A)::QAB1(C),XQ(a)
- Q(a);OGATEB::R(A),XQ(a)
- P(c);OGATEB::QAB(C),XP(d)
- Refutation
- P(d);
- Try
- Q(C);
- Threat
- DUALS(2)
- Vars
- Q(a);CHECK,OGATEB::R(A),XQ(a)
- P(c);N_GUARD::QAB1(C)
- Q(a);OGATEB::R(A),XQ(a)
- Refutation
- Q(a);N_SPINQ(a),XR(A)
- Try
- Actual
- Q(C);
- Threat
- QAR1(C)
- Vars
- Q(a);CHECK,OGATEB::R(A),XQ(a)
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).