MESON Chess Problem Database
Problem Display
PID: 159907 (1Kn5/1b5R/R1q1kp1Q/1N6/4B1P1/2p2N1P/8/b5n1 w - - 0 1)
Anonymous
BCPJ (August), 1919
#2
9 + 8
SOLUTION
- SOUND
- Sets
- 1...Qd6+
- 2.Sc7#
- 1...Sd6
- 2.Sbd4#
- 1...Qd6+
- Tries
- 1.Rxc6+?
- 1...Sd6
- 2.Sbd4#
- 2.Sc7#
- 2.Rxd6#
- 1...Bxc6!
- 1...Sd6
- 1.Qd2?
- threat
- 2.Sc7#
- 2.Bd5#
- 2.Bf5#
- 2.Qa2#
- 2.Qd5#
- 2.Qd7#
- 1...Qd6+
- 2.Sc7#
- 1...Qxa6
- 2.Sc7#
- 2.Bf5#
- 2.Qd7#
- 1...Bxa6
- 2.Bf5#
- 1...Sxf3
- 2.Qd5#
- 1...f5
- 2.Qh6#
- 1...Qb6
- 2.Sc7#
- 2.Bf5#
- 2.Qd7#
- 1...Bb2
- 2.Sc7#
- 2.Bd5#
- 2.Bf5#
- 2.Qd5#
- 2.Qd7#
- 1...Sb6
- 2.Bf5#
- 1...Sd6
- 2.Sbd4#
- 1...Se7
- 2.Sc7#
- 1...c2
- 2.Sc7#
- 2.Bd5#
- 2.Bf5#
- 2.Qd5#
- 2.Qd7#
- 1...cxd2!
- threat
- 1.Qf4?
- threat
- 2.Sfd4#
- 2.Sbd4#
- 2.Sc7#
- 2.Qf5#
- 1...Qd6+
- 2.Sc7#
- 1...Bxa6
- 2.Sfd4#
- 2.Sbd4#
- 2.Qf5#
- 1...Sxf3
- 2.Sc7#
- 2.Qf5#
- 1...f5
- 2.Qe5#
- 2.Qh6#
- 2.Qxf5#
- 1...Se2
- 2.Sc7#
- 2.Qf5#
- 1...Sb6
- 2.Sfd4#
- 2.Sbd4#
- 2.Qf5#
- 1...Sd6
- 2.Sfd4#
- 2.Sbd4#
- 1...c2
- 2.Sc7#
- 2.Qf5#
- 1...Se7!
- threat
- 1.Qg7?
- threat
- 2.Qd7#
- 2.Qf7#
- 2.Qg8#
- 1...Qd6+
- 2.Sc7#
- 1...Bxa6
- 2.Qf7#
- 2.Qg8#
- 1...Se7
- 2.Qxe7#
- 1...Sb6
- 2.Qe7#
- 2.Qf7#
- 2.Qg8#
- 1...Sd6
- 2.Sbd4#
- 2.Qe7#
- 1...f5
- 2.Sfd4#
- 2.Sg5#
- 2.Rh6#
- 2.Qe5#
- 2.Qh6#
- 2.Qg6#
- 2.Qf7#
- 2.gxf5#
- 1...Sxf3!
- threat
- 1.Qf8?
- threat
- 2.Sbd4#
- 2.Sc7#
- 2.Qf7#
- 2.Qg8#
- 1...Qd6+
- 2.Sc7#
- 1...Bxa6
- 2.Sbd4#
- 2.Qf7#
- 2.Qg8#
- 1...Se7
- 2.Rxe7#
- 2.Qxe7#
- 1...Se2
- 2.Sc7#
- 2.Qf7#
- 2.Qg8#
- 1...Sb6
- 2.Sbd4#
- 2.Re7#
- 2.Qe7#
- 2.Qf7#
- 2.Qg8#
- 1...Sd6
- 2.Sbd4#
- 2.Re7#
- 2.Qe7#
- 1...c2
- 2.Sc7#
- 2.Qf7#
- 2.Qg8#
- 1...f5
- 2.Sbd4#
- 2.Sc7#
- 2.Qh6#
- 2.Qxf5#
- 2.Qf7#
- 2.gxf5#
- 1...Sxf3!
- threat
- 1.Qh5?
- threat
- 2.Sfd4#
- 2.Bd5#
- 2.Qf7#
- 2.Qd5#
- 2.Qf5#
- 1...Qd6+
- 2.Sc7#
- 1...Qxa6
- 2.Sfd4#
- 2.Qf7#
- 2.Qf5#
- 1...Bxa6
- 2.Sfd4#
- 2.Qf7#
- 2.Qf5#
- 1...Sxf3
- 2.Bd5#
- 2.Qd5#
- 2.Qf5#
- 1...f5
- 2.Qg6#
- 2.Qf7#
- 2.Qxf5#
- 2.Qh6#
- 1...Qb6
- 2.Sfd4#
- 2.Qf7#
- 2.Qf5#
- 1...Se2
- 2.Bd5#
- 2.Qf7#
- 2.Qd5#
- 2.Qf5#
- 1...Sb6
- 2.Sfd4#
- 2.Qf7#
- 2.Qf5#
- 1...Sd6
- 2.Sfd4#
- 2.Sbd4#
- 1...c2
- 2.Bd5#
- 2.Qf7#
- 2.Qd5#
- 2.Qf5#
- 1...Se7!
- threat
- 1.Qg6?
- threat
- 2.Qf5#
- 2.Qf7#
- 2.Qg8#
- 1...Qd6+
- 2.Sc7#
- 1...Sxf3
- 2.Qf5#
- 1...Sd6
- 2.Sbd4#
- 1...Se7!
- threat
- 1.Rxc6+?
- Keys
- 1.Qe3!
- threat
- 2.Bxc6#
- 1...Qd6+
- 2.Sc7#
- 1...Qxa6
- 2.Bc6#
- 2.Bxb7#
- 1...Sxf3
- 2.Bxf3#
- 1...f5
- 2.Qh6#
- 1...Qb6
- 2.Bxb7#
- 1...Sd6
- 2.Sbd4#
- 1...c2
- 2.Qb3#
- threat
- 1.Qe3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- Q(d);CHECK::S(E)
- S(h);N_SPINQ(d),SBLOCK::S(E)
- Tries
- Try
- R(F);CHECK,XQ(d)
- Refutation
- B(g);XR(F)
- Try
- Q(G);N_PINP(f)
- Threat
- DUALS(6)
- Vars
- Q(d);CHECK::S(E)
- B(g);N_SPINQ(d),XR(F)::B(C)
- S(b);XS(A)::QAB1(G)
- P(f);OGATEB::QAR(G)
- S(h);N_SPINQ(d)::B(C)
- S(h);N_SPINQ(d),SBLOCK::S(E)
- S(h);::S(E)
- Refutation
- P(c);XQ(G)
- Try
- Q(G);N_PINP(f)
- Threat
- DUALS(4)
- Vars
- Q(d);CHECK::S(E)
- Refutation
- S(h);
- Try
- Q(G);N_PINP(f)
- Threat
- DUALS(3)
- Vars
- Q(d);CHECK::S(E)
- S(h);N_GUARD::QAR1(G),XS(h)
- Refutation
- S(b);XS(A)
- Try
- Q(G);N_PINP(f)
- Threat
- DUALS(4)
- Vars
- Q(d);CHECK::S(E)
- Refutation
- S(b);XS(A)
- Try
- Q(G);N_PINP(f)
- Threat
- DUALS(5)
- Vars
- Q(d);CHECK::S(E)
- Refutation
- S(h);
- Try
- Q(G);
- Threat
- DUALS(3)
- Vars
- Q(d);CHECK::S(E)
- S(b);XS(A)::QAB1(G)
- S(h);N_SPINQ(d),SBLOCK::S(E)
- Refutation
- S(h);
- Try
- Actual
- Q(G);N_PINP(f)
- Threat
- QAR(G)+B(C),XQ(d)
- Vars
- Q(d);CHECK::S(E)
- S(b);OGATE,XS(A)::QAR(G)+B(C),XS(b)
- P(f);OGATEB::QAR(G)
- Q(d);OGATE::QAR(G)+B(C),XB(g)
- S(h);N_SPINQ(d),SBLOCK::S(E)
- P(c);OGATE::QAB(G)
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).