MESON Chess Problem Database
Problem Display
PID: 173525 (8/4K1p1/8/2k1N1Q1/1R6/2P5/4q1B1/8 w - - 0 1)
Alaikov, Venelin
Problemista, 1965
#2
6 + 3
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qd1
- 2.Sd3#
- 2.Sd7#
- 1...Qf1
- 2.Sd3#
- 2.Sd7#
- 2.Qe3#
- 1...Qd3
- 2.Sxd3#
- 2.Sd7#
- 1...Qc4
- 2.Sd3#
- 2.Sxc4#
- 2.Sd7#
- 1...Qg4
- 2.Sd3#
- 2.Sxg4#
- 2.Sd7#
- 1...Qb5
- 2.Sc4#
- 2.Sd7#
- 2.Qe3#
- 1...Qh5
- 2.Sd3#
- 2.Sd7#
- 2.Qe3#
- 1...Qa6
- 2.Sd3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 2.Qe3#
- 1...Qa2
- 2.Sd3#
- 2.Sc4#
- 2.Sd7#
- 2.Qe3#
- 1...Qb2
- 2.Sd3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 2.Qe3#
- 1...Qc2
- 2.Sd3#
- 2.Sd7#
- 2.Qe3#
- 1...Qd2
- 2.Sd3#
- 2.Sd7#
- 1...Qf2
- 2.Sd3#
- 2.Sd7#
- 1...Qe3
- 2.Qxe3#
- 1...Qxe5+
- 2.Qxe5#
- 1...Qd1
- Tries
- 1.Kd7?
- threat
- 2.Sd3#
- 2.Qe7#
- 1...Qd1+
- 2.Sd3#
- 1...Qd3+
- 2.Sxd3#
- 1...Qg4+
- 2.Sxg4#
- 1...Qd2+
- 2.Sd3#
- 1...Qxg2
- 2.Sd3#
- 1...Qxe5
- 2.Qxe5#
- 1...Qf3
- 2.Sd3#
- 2.Sxf3#
- 1...Qe4
- 2.Sd3#
- 1...Qa6
- 2.Sd3#
- 2.Sf3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sf7#
- 2.Qe3#
- 1...Qb5+!
- threat
- 1.Be4?
- threat
- 2.Sd3#
- 2.Sf3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 1...Qb5
- 2.Sc4#
- 2.Sd7#
- 2.Qe3#
- 2.Qg1#
- 1...Qd1
- 2.Sd3#
- 2.Sd7#
- 1...Qf1
- 2.Sd3#
- 2.Sf3#
- 2.Sd7#
- 2.Qe3#
- 1...Qd3
- 2.Sxd3#
- 2.Sd7#
- 1...Qf3
- 2.Sd3#
- 2.Sxf3#
- 2.Sd7#
- 1...Qc4
- 2.Sd3#
- 2.Sxc4#
- 2.Sd7#
- 1...Qg4
- 2.Sd3#
- 2.Sxg4#
- 2.Sd7#
- 2.Qe3#
- 1...Qh5
- 2.Sd3#
- 2.Sd7#
- 2.Qe3#
- 2.Qg1#
- 1...Qa2
- 2.Sd3#
- 2.Sc4#
- 2.Sd7#
- 2.Qe3#
- 1...Qd2
- 2.Sd3#
- 2.Sd7#
- 1...Qf2
- 2.Sd3#
- 2.Sf3#
- 2.Sd7#
- 1...Qg2
- 2.Sd3#
- 2.Sg4#
- 2.Sd7#
- 2.Qe3#
- 1...Qh2
- 2.Sd3#
- 2.Sd7#
- 2.Qe3#
- 1...Qe3
- 2.Sd3#
- 2.Sd7#
- 2.Qxe3#
- 1...g6
- 2.Sd3#
- 2.Sf3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sxg6#
- 2.Sd7#
- 2.Sf7#
- 1...Qxe4!
- threat
- 1.Rb5+?
- 1...Qxb5
- 2.Qe3#
- 1...Kxb5!
- 1...Qxb5
- 1.Qf4?
- threat
- 2.Qd4#
- 1...Qxe5+
- 2.Qxe5#
- 1...Qd1
- 2.Qc4#
- 1...Qd3
- 2.Sxd3#
- 1...Qc4
- 2.Sd7#
- 2.Qxc4#
- 1...Qg4
- 2.Sd3#
- 1...Qd2
- 2.Qc4#
- 1...Qf2
- 2.Sd3#
- 2.Sd7#
- 2.Qxf2#
- 2.Qc4#
- 1...Qe3
- 2.Qxe3#
- 2.Qc4#
- 1...Qe4!
- threat
- 1.Qf6?
- threat
- 2.Qb6#
- 2.Qc6#
- 2.Qd6#
- 1...Qxe5+
- 2.Qxe5#
- 1...Qxg2
- 2.Qd6#
- 1...Qf3
- 2.Qd6#
- 1...Qe4
- 2.Qd6#
- 1...Qd1
- 2.Qb6#
- 2.Qc6#
- 1...Qd3
- 2.Sxd3#
- 2.Qb6#
- 2.Qc6#
- 1...Qb5
- 2.Qf2#
- 2.Qd6#
- 1...Qa6
- 2.Sd7#
- 2.Qf2#
- 1...Qd2
- 2.Qb6#
- 2.Qc6#
- 1...gxf6!
- threat
- 1.Qg6?
- threat
- 2.Qb6#
- 2.Qc6#
- 2.Qd6#
- 1...Qxg2
- 2.Qd6#
- 1...Qf3
- 2.Qd6#
- 1...Qe4
- 2.Qd6#
- 1...Qd1
- 2.Qb6#
- 2.Qc6#
- 1...Qd3
- 2.Sxd3#
- 2.Qb6#
- 2.Qc6#
- 1...Qb5
- 2.Qd6#
- 1...Qa6
- 2.Sd7#
- 1...Qd2
- 2.Qb6#
- 2.Qc6#
- 1...Qxe5+!
- threat
- 1.Kd7?
- Keys
- 1.Ke6!
- threat
- 2.Qe7#
- 1...Qc4+
- 2.Sxc4#
- 1...Qg4+
- 2.Sxg4#
- 1...Qa6+
- 2.Sc6#
- 1...Qa2+
- 2.Sc4#
- 1...Qxe5+
- 2.Qxe5#
- 1...Qb5
- 2.Sc4#
- 2.Sd7#
- 2.Qe3#
- 1...Qd1
- 2.Sd3#
- 2.Sd7#
- 1...Qd3
- 2.Sxd3#
- 2.Sd7#
- 1...Qd2
- 2.Sd3#
- 2.Sd7#
- threat
- 1.Ke6!
This is a version of 173533
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 1
- Sets
- Q(a);N_GUARD::QAB(E),XQ(a)
- Q(a);CHECK,OGATE,P_SPINQ(a),XS(D)::QAR2(E),XQ(a)
- Tries
- Try
- K(F);N_SPINS(D),P-FLIGHT
- Threat
- DUALS(2)
- Vars
- Q(a);CHECK::QAR(E)+S(D),DCHECK
- Q(a);CHECK::QAR(E)+S(D),DCHECK,XQ(a)
- Q(a);CHECK,N_GUARD::QAR(E)+S(D),XQ(a)
- Q(a);XB(A)::QAR(E)+S(D),DCHECK
- Q(a);OGATE,P_SPINQ(a),XS(D)::QAR2(E),XQ(a)
- Q(a);::QAR(E)+S(D),DCHECK
- Refutation
- Q(a);CHECK
- Try
- B(A);N_SPINS(D)
- Threat
- DUALS(8)
- Refutation
- Q(a);P_PINS(D),XB(A)
- Try
- R(C);CHECK
- Vars
- Q(a);N_PINS(D),SBLOCK,XR(C)::QAB(E)
- Refutation
- K(b);P-FLIGHT,XR(C)
- Try
- Q(E);
- Threat
- QAB1(E)
- Vars
- Q(a);CHECK,OGATE,XS(D)::QAR2(E),XQ(a)
- Q(a);N_GUARD,N_PINS(D)::QAR1(E)
- Q(a);N_PINS(D)::S(D),XQ(a)
- Q(a);N_PINS(D)::S(D)
- Refutation
- Q(a);
- Try
- Q(E);
- Threat
- DUALS(3)
- Vars
- Q(a);CHECK,OGATE,XS(D)::QAR2(E),XQ(a)
- Q(a);N_PINS(D),XB(A)::QAB1(E)
- Q(a);N_PINS(D)::QAB1(E)
- Q(a);::QAB1(E)
- Refutation
- P(c);XQ(E)
- Try
- Q(E);
- Threat
- DUALS(3)
- Vars
- Q(a);N_PINS(D),XB(A)::QAB1(E)
- Q(a);N_PINS(D)::QAB1(E)
- Q(a);::QAB1(E)
- Q(a);N_PINS(D)::S(D)
- Refutation
- Q(a);CHECK,XS(D)
- Try
- Actual
- K(F);P-FLIGHT
- Threat
- QAB(E)
- Vars
- Q(a);CHECK,N_PINS(D)::QAR(E)+S(D),XQ(a)
- Q(a);CHECK,N_PINS(D)::QAR(E)+S(D)
- Q(a);CHECK,OGATE,P_SPINQ(a),XS(D)::QAR2(E),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).