MESON Chess Problem Database
Problem Display
PID: 10566 (5n1K/1pn1Q3/q4p1p/r1R4p/1N1PBk1N/4p1Rb/7P/2b5 w - - 0 1)
Valois, Paul Stedman
The Problemist, 1965
#2
9 + 12
SOLUTION
- SOUND
- Sets
- 1...Qd3
- 2.Sxd3#
- 1...Qb6
- 2.Sd3#
- 1...Qc6
- 2.Sd3#
- 1...Qd6
- 2.Sd3#
- 1...Qa7
- 2.Sd3#
- 1...Qa8
- 2.Sd3#
- 1...Rb5
- 2.Sd3#
- 1...Bg2
- 2.Sxg2#
- 1...Bg4
- 2.Sg2#
- 1...Bf5
- 2.Sg2#
- 1...Bd7
- 2.Sg2#
- 1...Bc8
- 2.Sg2#
- 1...Sb5
- 2.Sd3#
- 2.Sd5#
- 1...Sd5
- 2.Sxd5#
- 1...Sa8
- 2.Sd5#
- 1...Se8
- 2.Sd5#
- 1...Sg6+
- 2.Sxg6#
- 1...Sd7
- 2.Sg6#
- 1...Sh7
- 2.Sg6#
- 1...f5
- 2.Qe5#
- 1...b5
- 2.Sd3#
- 1...Qd3
- Tries
- 1.Bb1?
- threat
- 2.Qe4#
- 1...Sg6+
- 2.Sxg6#
- 1...Qd3
- 2.Sxd3#
- 1...Qc6
- 2.Sd3#
- 1...Bg2
- 2.Sxg2#
- 1...Bf5
- 2.Sg2#
- 1...Be6
- 2.Sg2#
- 1...Sce6
- 2.Sd5#
- 1...Sfe6
- 2.Sg6#
- 1...f5
- 2.Qe5#
- 1...Qe6!
- threat
- 1.Bh1?
- threat
- 2.Qe4#
- 1...Sg6+
- 2.Sxg6#
- 1...Qd3
- 2.Sxd3#
- 2.Qd6#
- 2.Qxc7#
- 1...Qc6
- 2.Sd3#
- 1...Qe6
- 2.Sd3#
- 1...Bg2
- 2.Sxg2#
- 1...Bf5
- 2.Sg2#
- 1...Sce6
- 2.Sd5#
- 1...Sfe6
- 2.Sg6#
- 1...f5
- 2.Qe5#
- 1...Be6!
- threat
- 1.Bc2?
- threat
- 2.Qe4#
- 1...Sg6+
- 2.Sxg6#
- 1...Qd3
- 2.Sxd3#
- 1...Qc6
- 2.Sd3#
- 1...Bg2
- 2.Sxg2#
- 1...Bf5
- 2.Sg2#
- 1...Be6
- 2.Sg2#
- 1...Sce6
- 2.Sd5#
- 1...Sfe6
- 2.Sg6#
- 1...f5
- 2.Qe5#
- 1...Qe6!
- threat
- 1.Bf5?
- threat
- 2.Qe4#
- 1...Sg6+
- 2.Sxg6#
- 1...Bxf5
- 2.Sg2#
- 1...Qe6
- 2.Sd3#
- 1...Qd3
- 2.Sxd3#
- 2.Qd6#
- 2.Qxc7#
- 1...Qc6
- 2.Sd3#
- 1...Bg2
- 2.Sxg2#
- 1...Sce6
- 2.Sd5#
- 1...Sfe6
- 2.Sg6#
- 1...Bg4!
- threat
- 1.Bc6?
- threat
- 2.Qd6#
- 2.Qe4#
- 2.Qxc7#
- 1...Sg6+
- 2.Sxg6#
- 1...Qxc6
- 2.Sd3#
- 1...Rxc5
- 2.Qe4#
- 1...Qd3
- 2.Sxd3#
- 2.Qd6#
- 2.Qxc7#
- 1...Qb6
- 2.Sd3#
- 2.Qd6#
- 2.Qe4#
- 1...Bg2
- 2.Sxg2#
- 2.Qd6#
- 2.Qxf6#
- 2.Qxc7#
- 1...Bf5
- 2.Sg2#
- 2.Qd6#
- 2.Qxc7#
- 1...Be6
- 2.Sg2#
- 2.Qd6#
- 2.Qxc7#
- 1...Bd7
- 2.Sg2#
- 2.Qd6#
- 2.Qe4#
- 1...Sb5
- 2.Sd3#
- 2.Sd5#
- 2.Qe4#
- 1...Sd5
- 2.Sxd5#
- 1...Sce6
- 2.Qd6#
- 1...Sa8
- 2.Sd5#
- 2.Qd6#
- 2.Qe4#
- 1...Se8
- 2.Sd5#
- 2.Qe4#
- 1...Sfe6
- 2.Sg6#
- 2.Qd6#
- 1...Sd7
- 2.Sg6#
- 2.Qe4#
- 1...f5
- 2.Qd6#
- 2.Qe5#
- 2.Qxc7#
- 1...bxc6!
- threat
- 1.Bg6?
- threat
- 2.Qe4#
- 1...Sxg6+
- 2.Sxg6#
- 1...Qe6
- 2.Sd3#
- 1...Qd3
- 2.Sxd3#
- 2.Qd6#
- 2.Qxc7#
- 1...Qc6
- 2.Sd3#
- 1...Bg2
- 2.Sxg2#
- 1...Bf5
- 2.Sg2#
- 1...Be6
- 2.Sg2#
- 1...Sce6
- 2.Sd5#
- 1...f5
- 2.Qe5#
- 1...Sfe6!
- threat
- 1.Bxb7?
- threat
- 2.Qe4#
- 1...Sg6+
- 2.Sxg6#
- 1...Qxb7
- 2.Sd3#
- 1...Qe6
- 2.Sd3#
- 1...Qd3
- 2.Sxd3#
- 2.Qd6#
- 2.Qxc7#
- 1...Qc6
- 2.Sd3#
- 1...Bg2
- 2.Sxg2#
- 1...Bf5
- 2.Sg2#
- 1...Be6
- 2.Sg2#
- 1...Sd5
- 2.Sxd5#
- 1...Sfe6
- 2.Sg6#
- 1...f5
- 2.Qe5#
- 1...Sce6!
- threat
- 1.Bh7?
- threat
- 2.Qe4#
- 1...Sg6+
- 2.Sxg6#
- 1...Sxh7
- 2.Sg6#
- 1...Qe6
- 2.Sd3#
- 1...Qd3
- 2.Sxd3#
- 2.Qd6#
- 2.Qxc7#
- 1...Qc6
- 2.Sd3#
- 1...Bg2
- 2.Sxg2#
- 1...Bf5
- 2.Sg2#
- 1...Be6
- 2.Sg2#
- 1...Sce6
- 2.Sd5#
- 1...f5
- 2.Qe5#
- 1...Sfe6!
- threat
- 1.Rf5+?
- 1...Bxf5
- 2.Sg2#
- 1...Rxf5!
- 1...Bxf5
- 1.Qxf6+?
- 1...Kxe4
- 2.Qe5#
- 1...Bf5
- 2.Qe5#
- 2.Qxf5#
- 1...Qxf6+!
- 1...Kxe4
- 1.Bb1?
- Keys
- 1.Bf3!
- threat
- 2.Qe4#
- 1...Sg6+
- 2.Sxg6#
- 1...Qe6
- 2.Sd3#
- 1...Qd3
- 2.Sxd3#
- 2.Qd6#
- 2.Qxc7#
- 1...Qc6
- 2.Sd3#
- 1...Bf5
- 2.Sg2#
- 1...Be6
- 2.Sg2#
- 1...Sce6
- 2.Sd5#
- 1...Sfe6
- 2.Sg6#
- 1...f5
- 2.Qe5#
- threat
- 1.Bf3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 16
- Sets
- Q(g);N_GUARD::S(C),XQ(g)
- Q(g);N_GUARD::S(C)
- R(e);S_CUTQ(g)::S(C)
- B(c);N_GUARD::S(F),XB(c)
- B(c);N_GUARD::S(F)
- S(k);N_GUARD::S(C),XS(k)
- S(k);N_GUARD::S(C)
- S(l);CHECK,N_GUARD::S(F),XS(l)
- S(l);N_GUARD::S(F)
- P(h);N_GUARD::QAB1(H)
- P(j);S_CUTQ(g)::S(C)
- Tries
- Try
- B(E);
- Threat
- QAR1(H)
- Vars
- S(l);CHECK,N_GUARD::S(F),XS(l)
- Q(g);N_GUARD::S(C),XQ(g)
- Q(g);N_GUARD::S(C)
- B(c);N_GUARD::S(F),XB(c)
- B(c);N_GUARD::S(F)
- S(k);N_GUARD::S(C)
- S(l);N_GUARD::S(F)
- P(h);N_GUARD::QAB1(H)
- Refutation
- Q(g);
- Try
- B(E);
- Threat
- QAR1(H)
- Vars
- S(l);CHECK,N_GUARD::S(F),XS(l)
- Q(g);N_GUARD::S(C)
- B(c);N_GUARD::S(F),XB(c)
- B(c);N_GUARD::S(F)
- S(k);N_GUARD::S(C)
- S(l);N_GUARD::S(F)
- P(h);N_GUARD::QAB1(H)
- Refutation
- B(c);
- Try
- B(E);
- Threat
- QAR1(H)
- Vars
- S(l);CHECK,N_GUARD::S(F),XS(l)
- Q(g);N_GUARD::S(C),XQ(g)
- Q(g);N_GUARD::S(C)
- B(c);N_GUARD::S(F),XB(c)
- B(c);N_GUARD::S(F)
- S(k);N_GUARD::S(C)
- S(l);N_GUARD::S(F)
- P(h);N_GUARD::QAB1(H)
- Refutation
- Q(g);
- Try
- B(E);
- Threat
- QAR1(H)
- Vars
- S(l);CHECK,N_GUARD::S(F),XS(l)
- B(c);N_GUARD,XB(E)::S(F)
- Q(g);N_GUARD::S(C)
- B(c);N_GUARD::S(F),XB(c)
- S(k);N_GUARD::S(C)
- S(l);N_GUARD::S(F)
- Refutation
- B(c);
- Try
- B(E);
- Threat
- DUALS(3)
- Vars
- S(l);CHECK,N_GUARD::S(F),XS(l)
- Q(g);N_GUARD,XB(E)::S(C)
- R(e);XR(G)::QAR1(H)
- S(k);N_GUARD::S(C),XS(k)
- S(k);::QAB(H)
- Refutation
- P(j);XB(E)
- Try
- B(E);
- Threat
- QAR1(H)
- Vars
- S(l);CHECK,XB(E)::S(F),XS(l)
- Q(g);N_GUARD::S(C)
- B(c);N_GUARD::S(F),XB(c)
- B(c);N_GUARD::S(F)
- S(k);N_GUARD::S(C)
- P(h);N_GUARD::QAB1(H)
- Refutation
- S(l);
- Try
- B(E);XP(j)
- Threat
- QAR1(H)
- Vars
- S(l);CHECK,N_GUARD::S(F),XS(l)
- Q(g);N_GUARD,XB(E)::S(C)
- Q(g);N_GUARD::S(C)
- B(c);N_GUARD::S(F),XB(c)
- B(c);N_GUARD::S(F)
- S(k);N_GUARD::S(C),XS(k)
- S(l);N_GUARD::S(F)
- P(h);N_GUARD::QAB1(H)
- Refutation
- S(k);
- Try
- B(E);
- Threat
- QAR1(H)
- Vars
- S(l);CHECK,N_GUARD::S(F),XS(l)
- S(l);N_GUARD,XB(E)::S(F)
- Q(g);N_GUARD::S(C)
- B(c);N_GUARD::S(F),XB(c)
- B(c);N_GUARD::S(F)
- S(k);N_GUARD::S(C)
- P(h);N_GUARD::QAB1(H)
- Refutation
- S(l);
- Try
- R(G);CHECK
- Vars
- B(c);XR(G)::S(F)
- Refutation
- R(e);XR(G)
- Try
- Q(H);CHECK,XP(h)
- Vars
- K(d);P-FLIGHT,XB(E)::QAR1(H)
- Refutation
- Q(g);CHECK,XQ(H)
- Try
- Actual
- B(E);
- Threat
- QAR1(H)
- Vars
- S(l);CHECK,N_GUARD::S(F),XS(l)
- Q(g);N_GUARD::S(C)
- B(c);N_GUARD::S(F)
- S(k);N_GUARD::S(C)
- S(l);N_GUARD::S(F)
- P(h);N_GUARD::QAB1(H)
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).