MESON Chess Problem Database
Problem Display
PID: 248433 (nB4B1/2rp4/1p1Pq3/1P1kN3/RbR1NK2/2p1Pn2/2P3Q1/8 w - - 0 1)
Ellison, Wallace D
British Chess Magazine, 1932
#2
12 + 9
SOLUTION
- SOUND
- Sets
- 1...Qf7+
- 2.Bxf7#
- 1...Qxg8
- 2.Qxg8#
- 1...Rc5
- 2.Sf6#
- 1...Rc6
- 2.Sf6#
- 1...Ra7
- 2.Sf6#
- 1...Rb7
- 2.Sf6#
- 1...Rc8
- 2.Sf6#
- 1...Bxd6
- 2.Sxc3#
- 2.Sf6#
- 1...Se1
- 2.Rd4#
- 1...Sg1
- 2.Rd4#
- 1...Sd2
- 2.Rd4#
- 1...Sh2
- 2.Rd4#
- 1...Sd4
- 2.Rxd4#
- 1...Sh4
- 2.Rd4#
- 1...Sxe5
- 2.Rd4#
- 1...Sg5
- 2.Rd4#
- 1...Qf7+
- Tries
- 1.Bxc7?
- threat
- 2.Sf6#
- 1...Qf7+
- 2.Bxf7#
- 1...Qxg8
- 2.Qxg8#
- 1...Sxe5
- 2.Rd4#
- 1...Sxc7!
- threat
- 1.Bxe6+?
- 1...Kxe6
- 2.Qg8#
- 1...dxe6!
- 1...Kxe6
- 1.Raxb4?
- 1...Qf7+
- 2.Bxf7#
- 1...Qxg8
- 2.Qxg8#
- 1...Sxe5
- 2.Rd4#
- 1...Rc5
- 2.Sxc3#
- 2.Sf6#
- 1...Rc6
- 2.Sxc3#
- 2.Sf6#
- 1...Ra7
- 2.Sxc3#
- 2.Sf6#
- 1...Rb7
- 2.Sxc3#
- 2.Sf6#
- 1...Rc8
- 2.Sxc3#
- 2.Sf6#
- 1...Se1
- 2.Rd4#
- 1...Sg1
- 2.Rd4#
- 1...Sd2
- 2.Rd4#
- 1...Sh2
- 2.Rd4#
- 1...Sd4
- 2.Rxd4#
- 1...Sh4
- 2.Rd4#
- 1...Sg5
- 2.Rd4#
- 1...Rxc4!
- 1...Qf7+
- 1.Qd2+?
- 1...Sxd2
- 2.Rd4#
- 1...Sd4
- 2.Rxd4#
- 2.Qxd4#
- 1...cxd2!
- 1...Sxd2
- 1.Bxc7?
- Keys
- 1.Qg5!
- 1...Qf7+
- 2.Bxf7#
- 1...Qxg8
- 2.Qxg8#
- 1...Rxc4
- 2.Sxf3#
- 1...Bxd6
- 2.Sxc3#
- 2.Sf6#
- 1...Sxe5
- 2.Rd4#
- 1...Sxg5
- 2.Rd4#
- 1...Ba3
- 2.Sxf3#
- 1...Rc5
- 2.Sf6#
- 1...Rc6
- 2.Sf6#
- 1...Ra7
- 2.Sf6#
- 1...Rb7
- 2.Sf6#
- 1...Rc8
- 2.Sf6#
- 1...Ba5
- 2.Sxf3#
- 1...Bc5
- 2.Sxf3#
- 1...Se1
- 2.Rd4#
- 1...Sg1
- 2.Rd4#
- 1...Sd2
- 2.Rd4#
- 1...Sh2
- 2.Rd4#
- 1...Sd4
- 2.Rxd4#
- 1...Sh4
- 2.Rd4#
- 1...Qf7+
- 1.Qg5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- Q(f);CHECK,OGATEB::B(L),XQ(f)
- Q(f);N_SPINQ(f),OGATE,XB(L)::QAB(B),XQ(f)
- R(g);::S(F)
- S(b);N_GUARD::R1(E)
- S(b);N_GUARD::R1(E),XS(b)
- S(b);N_GUARD,XS(I)::R1(E)
- Tries
- Try
- B(K);XR(g)
- Threat
- S(F)
- Vars
- Q(f);CHECK,OGATEB::B(L),XQ(f)
- Q(f);N_SPINQ(f),OGATE,XB(L)::QAB(B),XQ(f)
- S(b);N_GUARD,XS(I)::R1(E)
- Refutation
- S(i);XB(K)
- Try
- B(L);CHECK,XQ(f)
- Vars
- K(d);S_FLIGHT,XB(L)::QAB(B)
- Refutation
- P(h);XB(L)
- Try
- R(D);XB(c)
- Vars
- Q(f);CHECK,OGATEB::B(L),XQ(f)
- Q(f);N_SPINQ(f),OGATE,XB(L)::QAB(B),XQ(f)
- S(b);N_GUARD,XS(I)::R1(E)
- S(b);N_GUARD::R1(E)
- S(b);N_GUARD::R1(E),XS(b)
- Refutation
- R(g);P_PINS(F),XR(E)
- Try
- Q(B);CHECK
- Vars
- S(b);N_GUARD,XQ(B)::R1(E)
- Refutation
- P(a);XQ(B)
- Try
- Actual
- Q(B);
- Vars
- Q(f);CHECK,OGATEB::B(L),XQ(f)
- Q(f);N_SPINQ(f),OGATE,XB(L)::QAB(B),XQ(f)
- R(g);P_PINS(F),SBLOCK,XR(E)::QAR(B)+S(I),XS(b)
- S(b);N_GUARD,P_SPINS(b),XS(I)::R1(E)
- S(b);N_GUARD,XQ(B)::R1(E)
- B(c);::QAR(B)+S(I),XS(b)
- R(g);::S(F)
- S(b);N_GUARD::R1(E)
- S(b);N_GUARD::R1(E),XS(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).