MESON Chess Problem Database
Problem Display
PID: 93150 (8/2p2p2/2B1pP2/2P1k2K/1P4pN/2q3p1/1N4P1/B4Q2 w - - 0 1)
Gavrilov, Constantin Grigorievich
Tidskrift for Schack, 1928
#2
10 + 7
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Kd4
- 2.Qf4#
- 1...Qe1
- 2.Sd3#
- 2.Sc4#
- 1...Qxb2
- 2.Bxb2#
- 1...Qd2
- 2.Sd3#
- 2.Sc4#
- 1...Qxb4
- 2.Sd3#
- 2.Sc4#
- 1...Qd4
- 2.Sd3#
- 2.Sc4#
- 1...Qc1
- 2.Sd3#
- 2.Sc4#
- 1...Qc2
- 2.Sd3#
- 2.Sc4#
- 1...Qa3
- 2.Sd3#
- 2.Sc4#
- 1...Qb3
- 2.Sd3#
- 2.Sc4#
- 1...Qd3
- 2.Sxd3#
- 2.Sc4#
- 1...Qe3
- 2.Sd3#
- 2.Sc4#
- 1...Qf3
- 2.Sd3#
- 1...Qc4
- 2.Sd3#
- 2.Sxc4#
- 1...Qxc5
- 2.Sc4#
- 1...Kd4
- Tries
- 1.Sg6+?
- 1...Kd4
- 2.Qf4#
- 1...fxg6+!
- 1...Kd4
- 1.Bb7?
- 1...Kd4
- 2.Qf4#
- 1...Qxb2
- 2.Bxb2#
- 1...Qxb4
- 2.Sd3#
- 2.Sc4#
- 1...Qxc5
- 2.Sc4#
- 1...Qf3
- 2.Sd3#
- 1...Qe1
- 2.Sd3#
- 2.Sc4#
- 1...Qd2
- 2.Sd3#
- 2.Sc4#
- 1...Qd4
- 2.Sd3#
- 2.Sc4#
- 1...Qc1
- 2.Sd3#
- 2.Sc4#
- 1...Qc2
- 2.Sd3#
- 2.Sc4#
- 1...Qa3
- 2.Sd3#
- 2.Sc4#
- 1...Qb3
- 2.Sd3#
- 2.Sc4#
- 1...Qd3
- 2.Sxd3#
- 2.Sc4#
- 1...Qe3
- 2.Sd3#
- 2.Sc4#
- 1...Qc4
- 2.Sd3#
- 2.Sxc4#
- 1...c6!
- 1...Kd4
- 1.Ba8?
- 1...Kd4
- 2.Qf4#
- 1...Qxb2
- 2.Bxb2#
- 1...Qxb4
- 2.Sd3#
- 2.Sc4#
- 1...Qxc5
- 2.Sc4#
- 1...Qf3
- 2.Sd3#
- 1...Qe1
- 2.Sd3#
- 2.Sc4#
- 1...Qd2
- 2.Sd3#
- 2.Sc4#
- 1...Qd4
- 2.Sd3#
- 2.Sc4#
- 1...Qc1
- 2.Sd3#
- 2.Sc4#
- 1...Qc2
- 2.Sd3#
- 2.Sc4#
- 1...Qa3
- 2.Sd3#
- 2.Sc4#
- 1...Qb3
- 2.Sd3#
- 2.Sc4#
- 1...Qd3
- 2.Sxd3#
- 2.Sc4#
- 1...Qe3
- 2.Sd3#
- 2.Sc4#
- 1...Qc4
- 2.Sd3#
- 2.Sxc4#
- 1...c6!
- 1...Kd4
- 1.Qe2+?
- 1...Kd4
- 2.Qe4#
- 1...Kf4
- 2.Qe4#
- 1...Qe3
- 2.Sd3#
- 1...Kxf6!
- 1...Kd4
- 1.Qe1+?
- 1...Kd4
- 2.Qe4#
- 1...Kf4
- 2.Qe4#
- 1...Qxe1
- 2.Sd3#
- 1...Qe3
- 2.Sd3#
- 1...Kxf6!
- 1...Kd4
- 1.Qf2?
- threat
- 2.Sd3#
- 2.Sc4#
- 1...Qxb2
- 2.Bxb2#
- 1...Qxc5
- 2.Sc4#
- 1...Qf3
- 2.Sd3#
- 1...Qd3
- 2.Sxd3#
- 2.Sc4#
- 1...Qc4
- 2.Sd3#
- 2.Sxc4#
- 1...gxf2!
- threat
- 1.Qf3?
- 1...Kd4
- 2.Qe4#
- 2.Qf4#
- 1...Qxb2
- 2.Bxb2#
- 1...Qxb4
- 2.Sd3#
- 2.Sc4#
- 1...Qxf3
- 2.Sd3#
- 1...Qxc5
- 2.Sc4#
- 1...Qe1
- 2.Sd3#
- 2.Sc4#
- 1...Qd2
- 2.Sd3#
- 2.Sc4#
- 1...Qd4
- 2.Sd3#
- 2.Sc4#
- 1...Qc1
- 2.Sd3#
- 2.Sc4#
- 1...Qc2
- 2.Sd3#
- 2.Sc4#
- 1...Qa3
- 2.Sd3#
- 2.Sc4#
- 1...Qb3
- 2.Sd3#
- 2.Sc4#
- 1...Qd3
- 2.Sxd3#
- 2.Sc4#
- 1...Qe3
- 2.Sd3#
- 2.Sc4#
- 1...Qc4
- 2.Sd3#
- 2.Sxc4#
- 1...gxf3!
- 1...Kd4
- 1.Qf5+?
- 1...Kd4
- 2.Qe4#
- 2.Qf4#
- 1...exf5!
- 1...Kd4
- 1.b5?
- 1...Qxb2
- 2.Bxb2#
- 1...Qxc5
- 2.Sc4#
- 1...Qf3
- 2.Sd3#
- 1...Qe1
- 2.Sd3#
- 2.Sc4#
- 1...Qd2
- 2.Sd3#
- 2.Sc4#
- 1...Qb4
- 2.Sd3#
- 2.Sc4#
- 1...Qd4
- 2.Sd3#
- 2.Sc4#
- 1...Qa5
- 2.Sd3#
- 2.Sc4#
- 1...Qc1
- 2.Sd3#
- 2.Sc4#
- 1...Qc2
- 2.Sd3#
- 2.Sc4#
- 1...Qa3
- 2.Sd3#
- 2.Sc4#
- 1...Qb3
- 2.Sd3#
- 2.Sc4#
- 1...Qd3
- 2.Sxd3#
- 2.Sc4#
- 1...Qe3
- 2.Sd3#
- 2.Sc4#
- 1...Qc4
- 2.Sd3#
- 2.Sxc4#
- 1...Kd4!
- 1...Qxb2
- 1.Sg6+?
- Keys
- 1.Qc1!
- 1...Kd4
- 2.Qf4#
- 1...Kxf6
- 2.Qg5#
- 1...Qxb2
- 2.Bxb2#
- 1...Qxb4
- 2.Sd3#
- 2.Sc4#
- 1...Qxc1
- 2.Sd3#
- 1...Qxc5
- 2.Sc4#
- 1...Qd2
- 2.Sd3#
- 1...Qe3
- 2.Sd3#
- 1...Qe1
- 2.Sd3#
- 2.Sc4#
- 1...Qd4
- 2.Qg5#
- 1...Qc2
- 2.Sd3#
- 2.Sc4#
- 1...Qa3
- 2.Sd3#
- 2.Sc4#
- 1...Qb3
- 2.Sd3#
- 2.Sc4#
- 1...Qd3
- 2.Sxd3#
- 2.Sc4#
- 1...Qf3
- 2.Sd3#
- 2.Sc4#
- 1...Qc4
- 2.Sd3#
- 2.Sxc4#
- 1...Kd4
- 1.Qc1!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 1
- Sets
- K(d);S_FLIGHT::QAR2(B)
- Q(a);OGATE,P_SPINQ(a),XS(C)::B(A),XQ(a)
- Q(a);::B(A)+S(C),DCHECK
- Q(a);XP(G)::B(A)+S(C),DCHECK
- Tries
- Try
- S(F);CHECK
- Vars
- K(d);S_FLIGHT::QAR2(B)
- Refutation
- P(g);CHECK,XS(F)
- Try
- B(I);
- Vars
- K(d);S_FLIGHT::QAR2(B)
- Q(a);OGATE,P_SPINQ(a),XS(C)::B(A),XQ(a)
- Q(a);XP(G)::B(A)+S(C),DCHECK
- Q(a);::B(A)+S(C),DCHECK
- Refutation
- P(f);
- Try
- B(I);
- Vars
- K(d);S_FLIGHT::QAR2(B)
- Q(a);OGATE,P_SPINQ(a),XS(C)::B(A),XQ(a)
- Q(a);XP(G)::B(A)+S(C),DCHECK
- Q(a);::B(A)+S(C),DCHECK
- Refutation
- P(f);
- Try
- Q(B);CHECK
- Vars
- K(d);S_FLIGHT::QAR1(B)
- Q(a);P_SPINQ(a)::B(A)+S(C),DCHECK
- Refutation
- K(d);S_FLIGHT,XP(J)
- Try
- Q(B);CHECK
- Vars
- K(d);S_FLIGHT::QAR1(B)
- Q(a);XQ(B)::B(A)+S(C),DCHECK
- Q(a);P_SPINQ(a)::B(A)+S(C),DCHECK
- Refutation
- K(d);S_FLIGHT,XP(J)
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- Q(a);OGATE,P_SPINQ(a),XS(C)::B(A),XQ(a)
- Q(a);XP(G)::B(A)+S(C),DCHECK
- Q(a);::B(A)+S(C),DCHECK
- Refutation
- P(b);XQ(B)
- Try
- Q(B);
- Vars
- Q(a);OGATE,P_SPINQ(a),XS(C)::B(A),XQ(a)
- Q(a);XQ(B)::B(A)+S(C),DCHECK
- Q(a);XP(G)::B(A)+S(C),DCHECK
- Refutation
- P(c);XQ(B)
- Try
- Q(B);CHECK
- Refutation
- P(e);XQ(B)
- Try
- P(E);
- Vars
- Q(a);OGATE,P_SPINQ(a),XS(C)::B(A),XQ(a)
- Q(a);XP(G)::B(A)+S(C),DCHECK
- Q(a);::B(A)+S(C),DCHECK
- Refutation
- K(d);S_FLIGHT
- Try
- Actual
- Q(B);
- Vars
- K(d);S_FLIGHT::QAR2(B)
- K(d);S_FLIGHT,XP(J)::QAB1(B)
- Q(a);OGATE,P_SPINQ(a),XS(C)::B(A),XQ(a)
- Q(a);XQ(B)::B(A)+S(C),DCHECK
- Q(a);XP(G)::B(A)+S(C),DCHECK
- Q(a);::B(A)+S(C),DCHECK
- Q(a);SBLOCK::QAR2(B)
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).