MESON Chess Problem Database
Problem Display
PID: 24472 (2b2Q2/2Prp2K/3k1PNR/B7/1nR1PPB1/2p3N1/2q5/1r6 w - - 0 1)
Beal, Edward W
Coombe-Tennant, Joseph
1st Prize, Keystip Ty, 1973
#2
12 + 8
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Bxb4#
- 1...Rc1
- 2.Bxb4#
- 1...Rd1
- 2.Bxb4#
- 1...Re1
- 2.Bxb4#
- 1...Rf1
- 2.Bxb4#
- 1...Rg1
- 2.Bxb4#
- 1...Rh1
- 2.Bxb4#
- 1...Rxc7
- 2.Bxc7#
- 1...Rd8
- 2.Qxe7#
- 1...Sd5
- 2.e5#
- 1...Ra1
- Tries
- 1.Se5?
- threat
- 2.Sf7#
- 2.fxe7#
- 2.f7#
- 1...Rxc7
- 2.Sf7#
- 2.Bxc7#
- 1...Qh2
- 2.Sf7#
- 1...Rh1
- 2.Sf7#
- 2.Bxb4#
- 1...Rd8
- 2.Sf7#
- 2.Qxe7#
- 1...Sd5
- 2.Sf7#
- 2.Rc6#
- 1...Qxe4+!
- threat
- 1.Sh8?
- threat
- 2.Sf7#
- 2.fxe7#
- 2.f7#
- 1...Rxc7
- 2.Sf7#
- 2.Bxc7#
- 1...Qh2
- 2.Sf7#
- 1...Rh1
- 2.Sf7#
- 2.Bxb4#
- 1...Rd8
- 2.Sf7#
- 2.Qxe7#
- 1...Sd5
- 2.Sf7#
- 1...Qxe4+!
- threat
- 1.Qf7?
- threat
- 2.Sf5#
- 2.Qe6#
- 2.e5#
- 1...Qxe4
- 2.Sxe4#
- 1...Rxc7
- 2.Bxc7#
- 2.e5#
- 1...exf6
- 2.Sf5#
- 1...Qe2
- 2.Sf5#
- 2.Qe6#
- 1...Re1
- 2.Sf5#
- 2.Bxb4#
- 2.Qe6#
- 1...Rd8
- 2.Qxe7#
- 2.e5#
- 1...Sd3
- 2.Sf5#
- 2.Qd5#
- 2.Qe6#
- 1...Sc6
- 2.Sf5#
- 2.Qd5#
- 2.Qe6#
- 1...e5
- 2.Sf5#
- 2.fxe5#
- 1...e6!
- threat
- 1.fxe7?
- threat
- 2.Sh4#
- 2.Se5#
- 2.Sh8#
- 2.Qf6#
- 1...Rxe7+
- 2.Qxe7#
- 1...Rxc7
- 2.Bxc7#
- 1...Qh2
- 2.Sh4#
- 2.Qf6#
- 1...Rh1
- 2.Sh4#
- 2.Bxb4#
- 2.Qf6#
- 1...Rd8
- 2.exd8Q#
- 2.exd8S#
- 2.exd8B#
- 2.exd8R#
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Sd5
- 2.e5#
- 1...Qxe4!
- threat
- 1.f7?
- threat
- 2.Sh4#
- 2.Se5#
- 2.Sxe7#
- 2.Sh8#
- 1...Rxc7
- 2.Bxc7#
- 1...Qh2
- 2.Sh4#
- 1...Rh1
- 2.Sh4#
- 2.Bxb4#
- 1...Rd8
- 2.Qxe7#
- 1...Sd5
- 2.e5#
- 1...Qxe4!
- threat
- 1.Se5?
- Keys
- 1.Sxe7!
- threat
- 2.f7#
- 1...Qxe4+
- 2.Sxe4#
- 1...Rxe7+
- 2.Qxe7#
- 1...Rxc7
- 2.Bxc7#
- 1...Qh2
- 2.e5#
- 1...Rh1
- 2.Bxb4#
- 1...Rd8
- 2.Sxc8#
- 1...Sd5
- 2.Rc6#
- threat
- 1.Sxe7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 3
- REMOVED MATES = 6
- Sets
- R(a);N_GUARD::B(F),XS(d)
- R(a);N_GUARD,P_PINR(I)::B(F),XS(d)
- R(f);OGATE,XP(J)::B(F),XR(f)
- R(f);N_GUARD::QAB1(L),XP(g)
- S(d);SBLOCK::P(C)
- Tries
- Try
- S(H);P_SPINP(C)
- Threat
- DUALS(3)
- Vars
- Q(b);N_PINP(C),P_PINR(I)::S(H)
- Refutation
- Q(b);CHECK,XP(C)
- Try
- S(H);P_SPINP(C)
- Threat
- DUALS(3)
- Vars
- Q(b);N_PINP(C),P_PINR(I)::S(H)
- S(d);::S(H)
- Refutation
- Q(b);CHECK,XP(C)
- Try
- Q(L);N_PINP(g)
- Threat
- DUALS(3)
- Vars
- Q(b);P_PINS(H),XP(C)::S(A),XQ(b)
- P(g);P_PINQ(L),XP(G)::S(A)
- Refutation
- P(g);P_PINQ(L)
- Try
- P(G);P_SPINP(G),XP(g)
- Threat
- DUALS(4)
- Vars
- R(f);CHECK,OGATE,P_SPINR(f),XP(G)::QAB1(L),XR(f)
- R(f);OGATE,XP(J)::B(F),XR(f)
- S(d);SBLOCK::P(C)
- Refutation
- Q(b);P_PINS(H),XP(C)
- Try
- P(G);
- Threat
- DUALS(4)
- Vars
- R(f);OGATE,XP(J)::B(F),XR(f)
- Q(b);P_PINR(I)::R(I)+S(H)
- R(f);N_GUARD::QAB1(L),XP(g)
- S(d);SBLOCK::P(C)
- Refutation
- Q(b);P_PINS(H),XP(C)
- Try
- Actual
- S(H);P_SPINP(C),P_SPINS(H),XP(g)
- Threat
- R(I)+P(G)
- Vars
- Q(b);CHECK,XP(C)::S(A),XQ(b)
- R(f);CHECK,OGATE,P_SPINR(f),XS(H)::QAB1(L),XR(f)
- R(f);OGATE,XP(J)::B(F),XR(f)
- Q(b);N_PINP(C),P_PINR(I)::P(C)
- R(a);N_GUARD,P_PINR(I)::B(F),XS(d)
- R(f);N_PINS(H)::QAB(L)+S(H),DCHECK,XB(h)
- S(d);N_GUARD::R1(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).