MESON Chess Problem Database
Problem Display
PID: 10812 (B2b4/rbPQN3/3nr3/B2p3R/1Pkn3R/2N1p3/1PP5/7K w - - 0 1)
Brotherton, David WA
2nd HM., Stella Polaris, 1968
#2
12 + 9
SOLUTION
- SOUND
- Sets
- 1...Ba6
- 2.Bxd5#
- 2.Qc6#
- 1...Bc6
- 2.Qxc6#
- 1...Bc8
- 2.Bxd5#
- 2.Qc6#
- 1...Sb5
- 2.Qxb5#
- 1...Sf5
- 2.Qb5#
- 1...Sf7
- 2.Qb5#
- 1...Sc8
- 2.Qb5#
- 1...Se8
- 2.Qb5#
- 1...Ba6
- Tries
- 1.Sb1?
- threat
- 2.Sa3#
- 2.b3#
- 1...Bc6
- 2.Sa3#
- 2.Qxc6#
- 1...Re4
- 2.Sa3#
- 1...Se4
- 2.Sa3#
- 1...Sb5
- 2.b3#
- 1...Rxa5!
- threat
- 1.Sb5?
- threat
- 2.Sa3#
- 2.Rxd4#
- 2.b3#
- 1...Rxa5
- 2.Rxd4#
- 1...Bc6
- 2.Sa3#
- 2.Qxc6#
- 1...Re4
- 2.Sa3#
- 2.Sxd6#
- 1...Se4
- 2.Sa3#
- 1...Sf5
- 2.Sa3#
- 2.b3#
- 1...Sxb5!
- threat
- 1.Sexd5?
- threat
- 2.b3#
- 1...Bxd5+
- 2.Bxd5#
- 1...Re4
- 2.Sb6#
- 1...Se4
- 2.Sxe3#
- 1...Bxh4!
- threat
- 1.Bxb7?
- threat
- 2.Bxd5#
- 2.Qc6#
- 1...Rxb7
- 2.Qc6#
- 1...Sxb7
- 2.Qb5#
- 2.Qxd5#
- 1...Re4
- 2.Bxd5#
- 1...Re5
- 2.Qc6#
- 1...Ra6
- 2.Bxd5#
- 1...Se4
- 2.Bxd5#
- 2.Qxd5#
- 1...Sb5
- 2.Bxd5#
- 2.Qxb5#
- 2.Qxd5#
- 1...Sf5
- 2.Bxd5#
- 2.Qb5#
- 2.Qxd5#
- 1...Sf7
- 2.Bxd5#
- 2.Qb5#
- 2.Qxd5#
- 1...Sc8
- 2.Bxd5#
- 2.Qb5#
- 2.Qxd5#
- 1...Se8
- 2.Bxd5#
- 2.Qb5#
- 2.Qxd5#
- 1...Rxa5!
- threat
- 1.Rxd5?
- threat
- 2.Rxd4#
- 1...Bxd5+
- 2.Bxd5#
- 1...Re4
- 2.Rc5#
- 1...Se4
- 2.Rxd4#
- 1...Sb5
- 2.Qxb5#
- 1...Sf5
- 2.Qb5#
- 1...Rh6!
- threat
- 1.c8Q+?
- 1...Bc6
- 2.Qdxc6#
- 2.Qcxc6#
- 1...Bxc8
- 2.Bxd5#
- 2.Qc6#
- 1...Sxc8
- 2.Qb5#
- 1...Bc7!
- 1...Bc6
- 1.c8R+?
- 1...Bc6
- 2.Rxc6#
- 2.Qxc6#
- 1...Bxc8
- 2.Bxd5#
- 2.Qc6#
- 1...Sxc8
- 2.Qb5#
- 1...Bc7!
- 1...Bc6
- 1.Sb1?
- Keys
- 1.Scxd5!
- threat
- 2.b3#
- 1...Bxd5+
- 2.Bxd5#
- 1...Bc6
- 2.Qxc6#
- 1...Re4
- 2.Sb6#
- 1...Se4
- 2.Sxe3#
- threat
- 1.Scxd5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 5
- Sets
- B(h);N_GUARD::QAR2(J),XB(h)
- S(e);N_GUARD::QAB1(J),XS(e)
- S(e);N_GUARD::QAB1(J)
- Tries
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- R(f);N_SPINS(c)::S(D)
- S(e);N_SPINS(c)::S(D)
- S(e);::P(B)
- Refutation
- R(g);XB(G)
- Try
- S(D);
- Threat
- DUALS(3)
- Vars
- R(g);XB(G)::R1(F),XS(c)
- S(e);N_SPINS(c)::S(D)
- Refutation
- S(e);XS(D)
- Try
- S(K);P_SPINS(K),XP(d)
- Threat
- P(B)
- Vars
- B(h);CHECK,OGATE,XS(K)::B(L),XB(h)
- R(f);N_PINS(K),N_SPINS(c)::S(K)
- S(e);N_PINS(K),N_SPINS(c)::S(K),XP(a)
- Refutation
- B(i);N_SPINS(c),XR(F)
- Try
- B(L);XB(h)
- Threat
- DUALS(2)
- Vars
- R(g);XB(L)::QAR2(J)
- R(f);N_SPINS(c)::B(L),XP(d)
- R(f);::QAR2(J)
- R(g);::B(L),XP(d)
- Refutation
- R(g);XB(G)
- Try
- R(H);P_SPINR(H),XP(d)
- Threat
- R1(F),XS(c)
- Vars
- B(h);CHECK,OGATE,XR(H)::B(L),XB(h)
- R(f);N_PINR(H),N_SPINS(c)::R1(H)
- S(e);N_PINR(H),N_SPINS(c)::R1(H),XS(c)
- S(e);N_GUARD::QAB1(J),XS(e)
- S(e);N_GUARD::QAB1(J)
- Refutation
- R(f);N_PINR(H),P_PINR(F)
- Try
- P(I);CHECK
- Vars
- S(e);XQ(I)::QAB1(J)
- Refutation
- B(i);P_SPINB(i)
- Try
- P(I);CHECK
- Vars
- S(e);XR(I)::QAB1(J)
- Refutation
- B(i);P_SPINB(i)
- Try
- Actual
- S(D);P_SPINS(D),XP(d)
- Threat
- P(B)
- Vars
- B(h);CHECK,OGATE,XS(D)::B(L),XB(h)
- B(h);N_GUARD::QAR2(J),XB(h)
- R(f);N_PINS(D),N_SPINS(c)::S(D)
- S(e);N_PINS(D),N_SPINS(c)::S(D),XP(a)
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).