MESON Chess Problem Database
Problem Display
PID: 11651 (7Q/B7/2P5/3K1p2/3R4/p1k2P2/5R2/N2q1B2 w - - 0 1)
Karpov, Valery N
Problem (Zagreb), 1970
#2
9 + 4
SOLUTION
- SOUND
- Sets
- 1...Qc2
- 2.Rxc2#
- 2.Ra4#
- 2.Rc4#
- 2.Re4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 1...Qb3+
- 2.Rc4#
- 1...Qxf3+
- 2.Re4#
- 1...Qa4
- 2.Rxa4#
- 2.Rc4#
- 1...Qb1
- 2.Ra4#
- 2.Rc4#
- 2.Re4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 1...Qc1
- 2.Ra4#
- 2.Rc4#
- 2.Re4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 1...Qe1
- 2.Rc2#
- 2.Rc4#
- 2.Re4#
- 1...Qxf1
- 2.Rc2#
- 1...Qxd4+
- 2.Qxd4#
- 1...Qc2
- Tries
- 1.Kc5?
- threat
- 2.Rxd1#
- 2.Rdd2#
- 2.Rd3#
- 2.Rc4#
- 1...Qxd4+
- 2.Qxd4#
- 1...Qxf3
- 2.Rc2#
- 2.Rd1#
- 2.Rdd2#
- 2.Rd3#
- 2.Ra4#
- 2.Rb4#
- 2.Rc4#
- 2.Re4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 2.Rd5#
- 2.Rd6#
- 2.Rd7#
- 2.Rd8#
- 1...Qxa1
- 2.Rd3#
- 2.Rb4#
- 1...Qxf1
- 2.Rc2#
- 2.Rd1#
- 2.Rdd2#
- 2.Rd5#
- 2.Rd6#
- 2.Rd7#
- 2.Rd8#
- 1...Qc2
- 2.Rxc2#
- 2.Rd1#
- 2.Rdd2#
- 2.Rd3#
- 2.Ra4#
- 2.Rb4#
- 2.Rc4#
- 2.Re4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 2.Rd5#
- 2.Rd6#
- 2.Rd7#
- 2.Rd8#
- 1...Qd2
- 2.Rdxd2#
- 2.Rd3#
- 2.Rc4#
- 1...Qb3
- 2.Rd1#
- 2.Rdd2#
- 2.Rd3#
- 2.Ra4#
- 2.Rb4#
- 2.Rc4#
- 2.Re4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 2.Rd5#
- 2.Rd6#
- 2.Rd7#
- 2.Rd8#
- 1...Qa4
- 2.Rd3#
- 2.Rxa4#
- 2.Rb4#
- 2.Rc4#
- 1...Qb1
- 2.Rd1#
- 2.Rdd2#
- 2.Rd3#
- 2.Ra4#
- 2.Rb4#
- 2.Rc4#
- 2.Re4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 2.Rd5#
- 2.Rd6#
- 2.Rd7#
- 2.Rd8#
- 1...Qc1
- 2.Rd1#
- 2.Rdd2#
- 2.Rd3#
- 2.Ra4#
- 2.Rb4#
- 2.Rc4#
- 2.Re4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 2.Rd5#
- 2.Rd6#
- 2.Rd7#
- 2.Rd8#
- 1...Qe1
- 2.Rc2#
- 2.Rd3#
- 2.Rc4#
- 2.Re4#
- 1...Qd3
- 2.Rxd3#
- 2.Rc4#
- 1...Qe2!
- threat
- 1.Bc5?
- threat
- 2.Bb4#
- 2.Rxd1#
- 2.Rdd2#
- 2.Rd3#
- 1...Qb3+
- 2.Rc4#
- 1...Qxf3+
- 2.Re4#
- 1...Qxd4+
- 2.Qxd4#
- 1...Qxa1
- 2.Rd3#
- 2.Rb4#
- 1...Qxf1
- 2.Bb4#
- 2.Rc2#
- 2.Rd1#
- 2.Rdd2#
- 1...Qc2
- 2.Rxc2#
- 2.Rd1#
- 2.Rdd2#
- 2.Rd3#
- 2.Ra4#
- 2.Rb4#
- 2.Rc4#
- 2.Re4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 1...Qd2
- 2.Rdxd2#
- 2.Rd3#
- 1...Qa4
- 2.Rd3#
- 2.Rxa4#
- 2.Rb4#
- 2.Rc4#
- 1...Qb1
- 2.Rd1#
- 2.Rdd2#
- 2.Rd3#
- 2.Ra4#
- 2.Rb4#
- 2.Rc4#
- 2.Re4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 1...Qc1
- 2.Bb4#
- 2.Rd1#
- 2.Rdd2#
- 2.Rd3#
- 2.Ra4#
- 2.Rb4#
- 2.Rc4#
- 2.Re4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 1...Qe1
- 2.Bb4#
- 2.Rc2#
- 2.Rd3#
- 2.Rc4#
- 2.Re4#
- 1...Qd3
- 2.Bb4#
- 2.Rxd3#
- 1...Qe2!
- threat
- 1.Kc5?
- Keys
- 1.Qb8!
- threat
- 2.Qb4#
- 1...Qb3+
- 2.Qxb3#
- 1...Qxf3+
- 2.Rxf3#
- 1...Qxd4+
- 2.Bxd4#
- 1...Qa4
- 2.Rd3#
- 1...Qb1
- 2.Rc4#
- threat
- 1.Qb8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- Q(a);CHECK,N_PINR(E)::QAB(I)+R(E),DCHECK
- Q(a);CHECK,N_PINR(E),XP(D)::QAB(I)+R(E)
- Q(a);N_GUARD,N_PINR(E),XB(B)::R1(C)
- Q(a);CHECK,OGATE,P_SPINQ(a),XR(E)::QAB1(I),XQ(a)
- Tries
- Try
- K(F);N_SPINR(E),P-FLIGHT
- Threat
- DUALS(4)
- Vars
- Q(a);CHECK,OGATE,P_SPINQ(a),XR(E)::QAB1(I),XQ(a)
- Refutation
- Q(a);
- Try
- B(H);
- Threat
- DUALS(4)
- Vars
- Q(a);CHECK,N_PINR(E)::QAB(I)+R(E),DCHECK
- Q(a);CHECK,N_PINR(E),XP(D)::QAB(I)+R(E)
- Q(a);CHECK,OGATE,P_SPINQ(a),XR(E)::QAB1(I),XQ(a)
- Refutation
- Q(a);N_PINR(E)
- Try
- Actual
- Q(I);
- Threat
- QAB1(I)
- Vars
- Q(a);CHECK,N_GUARD,N_PINR(E)::QAR1(I),XQ(a)
- Q(a);CHECK,N_PINR(E),OGATE,XP(D)::R(C),XQ(a)
- Q(a);CHECK,OGATE,XR(E)::B(H),XQ(a)
- Q(a);N_GUARD,N_PINR(E)::R1(E)
- Q(a);N_PINR(E)::R1(E)
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).