MESON Chess Problem Database
Problem Display
PID: 59936 (6B1/n1QP4/2pR1Pq1/r3k3/5p1N/B2br1n1/p3pN2/K1b5 w - - 0 1)
Sumner, Christopher Richard Benson
3rd Highly Comm., Brisbane Courier, 1925
#2
9 + 12
SOLUTION
- SOUND
- Sets
- 1...Qe4
- 2.Sg4#
- 1...Qe8
- 2.dxe8Q#
- 2.dxe8R#
- 1...Qxf6
- 2.Rd5#
- 1...Re4
- 2.Sxd3#
- 1...Bb2+
- 2.Bxb2#
- 1...Sf5
- 2.Sxg6#
- 1...Qe4
- Tries
- 1.d8Q?
- threat
- 2.Rxd3#
- 2.Rd4#
- 2.Rd5#
- 2.Rxc6#
- 2.Re6#
- 2.Rd7#
- 2.Qde7#
- 2.Qce7#
- 1...Bb2+
- 2.Bxb2#
- 1...Qxf6
- 2.Rd5#
- 2.Re6#
- 2.Rxf6#
- 2.Qxf6#
- 1...Qxg8
- 2.Rxc6#
- 1...Bxa3
- 2.Rd5#
- 2.Re6#
- 2.Qde7#
- 2.Qce7#
- 1...Rd5
- 2.Rxd5#
- 1...f3
- 2.Rxd3#
- 2.Rd4#
- 2.Rd5#
- 2.Rxc6#
- 2.Re6#
- 2.Rd7#
- 1...Qf5
- 2.Rxd3#
- 2.Rd4#
- 2.Rd5#
- 2.Rxc6#
- 2.Re6#
- 2.Rd7#
- 1...Qh7
- 2.Rd5#
- 2.Re6#
- 2.Rd7#
- 1...Qe8
- 2.Rxd3#
- 2.Rd4#
- 2.Rd5#
- 2.Rxc6#
- 2.Re6#
- 2.Rd7#
- 2.Qxe8#
- 1...Qg4
- 2.Rxd3#
- 2.Rd4#
- 2.Rd5#
- 2.Rxc6#
- 2.Re6#
- 2.Rd7#
- 1...Qg7
- 2.Rd5#
- 2.Re6#
- 2.Rd7#
- 1...Bb1
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Rxc6#
- 2.Re6#
- 2.Rd7#
- 2.Qde7#
- 2.Qce7#
- 1...Bc2
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Rxc6#
- 2.Re6#
- 2.Rd7#
- 2.Qde7#
- 2.Qce7#
- 1...Bc4
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Rxc6#
- 2.Re6#
- 2.Rd7#
- 1...Be4
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Rxc6#
- 2.Re6#
- 2.Rd7#
- 2.Qde7#
- 2.Qce7#
- 1...Bb5
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Rxc6#
- 2.Re6#
- 2.Rd7#
- 2.Qde7#
- 2.Qce7#
- 1...Bf5
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Rxc6#
- 2.Re6#
- 2.Rd7#
- 1...Ba6
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Rxc6#
- 2.Re6#
- 2.Rd7#
- 2.Qde7#
- 2.Qce7#
- 1...Se4
- 2.Rd5#
- 2.Re6#
- 2.Qde7#
- 2.Qce7#
- 1...Sf5
- 2.Sxg6#
- 2.Rd5#
- 2.Re6#
- 1...Sb5
- 2.Rd5#
- 2.Re6#
- 2.Qde7#
- 2.Qce7#
- 1...Sc8
- 2.Rd5#
- 2.Re6#
- 1...c5
- 2.Rxd3#
- 2.Rd4#
- 2.Rd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rd7#
- 2.Qde7#
- 2.Qce7#
- 1...Qf7!
- threat
- 1.d8Q?
- Keys
- 1.Qb6!
- threat
- 2.Qd4#
- 1...Bb2+
- 2.Qxb2#
- 1...Rc5
- 2.Qxc5#
- 1...Qe4
- 2.Sg4#
- 1...Re4
- 2.Sxd3#
- 1...Ra4
- 2.Qc5#
- 1...Rd5
- 2.Re6#
- 1...Sf5
- 2.Sxg6#
- 1...Sb5
- 2.Qc5#
- 1...c5
- 2.Rd5#
- threat
- 1.Qb6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 5
- REMOVED MATES = 1
- Sets
- Q(k);N_GUARD,SBLOCK::S(B)
- Q(k);OGATE::PXQ(k)=Q
- Q(k);SBLOCK,XP(F)::QAB(G)+R(E),DCHECK
- R(e);N_GUARD,SBLOCK,S_CUTQ(k)::S(B),XB(d)
- B(a);CHECK,N_GUARD::B(C),XB(a)
- S(f);SBLOCK,S_CUTB(d)::S(D),XQ(k)
- Tries
- Try
- P(H);
- Threat
- DUALS(8)
- Vars
- B(a);CHECK,N_GUARD::B(C),XB(a)
- Q(k);XB(I)::QAB(G)+R(E),XP(j)
- R(h);::QAB(G)+R(E),DCHECK,XR(h)
- Refutation
- Q(k);
- Try
- Actual
- Q(G);
- Threat
- QAB1(G)
- Vars
- B(a);CHECK,N_GUARD::QAB(G),XB(a)
- R(h);N_GUARD::QAR2(G),XR(h)
- Q(k);N_GUARD,SBLOCK::S(B)
- R(e);N_GUARD,SBLOCK,S_CUTQ(k)::S(B),XB(d)
- R(h);N_GUARD::QAR2(G)
- R(h);SBLOCK::R1(E)
- S(f);SBLOCK,S_CUTB(d)::S(D),XQ(k)
- S(l);S_CUTR(h)::QAR2(G)
- P(j);N_GUARD,S_CUTR(h)::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).