MESON Chess Problem Database
Problem Display
PID: 52946 (1q2N3/5nPn/1P3b2/1PPkB2Q/1K1N4/1b1B4/3R4/4r3 w - - 0 1)
Mussuri, Petr Stepanovich
Match: Moscow - Rostov, 1930
#2
11 + 7
| 20 | De Problemist | 1931 |
| 23 | Die Schwalbe | 2004 |
SOLUTION
- SOUND
- Sets
- 1...Qc7
- 2.Sxc7#
- 1...Qa8
- 2.Sc7#
- 1...Sf8
- 2.Sxf6#
- 1...Qc7
- Tries
- 1.Sf3?
- threat
- 2.Bf5#
- 2.Qxf7#
- 1...Re4+
- 2.Bc4#
- 1...Qxe5
- 2.Sc7#
- 1...Qxb6
- 2.Bf5#
- 1...Qxe8
- 2.Bf5#
- 1...Rxe5
- 2.Bf5#
- 1...Bxe5
- 2.Qxf7#
- 1...Sxe5
- 2.g8Q#
- 2.g8B#
- 1...Qd6
- 2.Bf5#
- 1...Qa7
- 2.Bf5#
- 1...Qc7
- 2.Sxc7#
- 2.Bf5#
- 1...Qb7
- 2.Bf5#
- 1...Qc8
- 2.Bf5#
- 1...Rd1
- 2.Qxf7#
- 1...Re2
- 2.Qxf7#
- 1...Re3
- 2.Qxf7#
- 1...Bc2
- 2.Qxf7#
- 1...Bc4
- 2.Qxf7#
- 1...Bg5
- 2.Qxf7#
- 1...Sfg5
- 2.Bf5#
- 1...Sd6
- 2.Bf5#
- 1...Sh6
- 2.Bf5#
- 1...Sd8
- 2.Bf5#
- 1...Sh8
- 2.Bf5#
- 1...Shg5
- 2.Bf5#
- 1...Sf8
- 2.Bf5#
- 1...Ke6!
- threat
- 1.Qf3+?
- 1...Re4
- 2.Qxe4#
- 1...Kxe5!
- 1...Re4
- 1.Sf3?
- Keys
- 1.Sc6!
- threat
- 2.Bf5#
- 2.Qxf7#
- 1...Re4+
- 2.Bc4#
- 1...Ke6
- 2.Bf5#
- 1...Qxe5
- 2.Sc7#
- 1...Qxe8
- 2.Bf5#
- 1...Rxe5
- 2.Bf5#
- 1...Bxe5
- 2.Qxf7#
- 1...Sxe5
- 2.g8Q#
- 2.g8B#
- 1...Qd6
- 2.Bf5#
- 1...Qa7
- 2.Bf5#
- 1...Qc7
- 2.Sxc7#
- 2.Bf5#
- 1...Qb7
- 2.Bf5#
- 1...Qc8
- 2.Bf5#
- 1...Rd1
- 2.Qxf7#
- 1...Re2
- 2.Qxf7#
- 1...Re3
- 2.Qxf7#
- 1...Bc2
- 2.Qxf7#
- 1...Bc4
- 2.Qxf7#
- 1...Bg5
- 2.Qxf7#
- 1...Sfg5
- 2.Bf5#
- 1...Sd6
- 2.Bf5#
- 1...Sh6
- 2.Bf5#
- 1...Sd8
- 2.Bf5#
- 1...Sh8
- 2.Bf5#
- 1...Shg5
- 2.Bf5#
- 1...Sf8
- 2.Bf5#
- threat
- 1.Sc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 22
- REMOVED MATES = 2
- Sets
- Q(g);N_GUARD::S(K),XQ(g)
- Q(g);N_GUARD::S(K)
- S(f);N_GUARD::S(K),XB(d)
- Tries
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- R(a);CHECK,SBLOCK::R(A)+B(B),DCHECK
- Q(g);N_GUARD,P_SPINQ(g),XB(G)::S(K)
- Q(g);P_PINP(E),XP(I)::R(A)+B(B)
- Q(g);XS(K)::R(A)+B(B)
- R(a);P_SPINR(a),XB(G)::R(A)+B(B)
- B(d);P_SPINB(d),XB(G)::QAB(H),XS(e)
- S(e);P_SPINS(e),XB(G)::P=Q
- Q(g);P_PINP(F)::R(A)+B(B)
- Q(g);::R(A)+B(B)
- R(a);::QAB(H),XS(e)
- B(b);::QAB(H),XS(e)
- B(d);::QAB(H),XS(e)
- S(e);::R(A)+B(B)
- S(f);::R(A)+B(B)
- Refutation
- K(c);S_FLIGHT
- Try
- Q(H);CHECK
- Vars
- R(a);N_GUARD,P_PINS(D),P_SPINR(a)::QAB1(H),XR(a)
- Refutation
- K(c);P-FLIGHT,XB(G)
- Try
- Actual
- S(D);
- Threat
- DUALS(2)
- Vars
- R(a);CHECK,SBLOCK::R(A)+B(B),DCHECK
- K(c);S_FLIGHT::B(B)
- Q(g);N_GUARD,P_SPINQ(g),XB(G)::S(K)
- Q(g);XS(K)::R(A)+B(B)
- R(a);P_SPINR(a),XB(G)::R(A)+B(B)
- B(d);P_SPINB(d),XB(G)::QAB(H),XS(e)
- S(e);P_SPINS(e),XB(G)::P=Q
- Q(g);P_PINP(F)::R(A)+B(B)
- Q(g);::R(A)+B(B)
- R(a);::QAB(H),XS(e)
- B(b);::QAB(H),XS(e)
- B(d);::QAB(H),XS(e)
- S(e);::R(A)+B(B)
- S(f);::R(A)+B(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).