MESON Chess Problem Database
Problem Display
PID: 45598 (N2b2Bn/1p3n2/1p1p4/rp1kpP2/pQ6/2R2b2/2PN2pK/6B1 w - - 0 1)
Conway-Poole, IM
Recomm., BCF 054. Ty., 1946-1947
#2
9 + 13
SOLUTION
- SOUND
- Sets
- 1...Ra6
- 2.Qxb5#
- 1...Ra7
- 2.Qxb5#
- 1...Rxa8
- 2.Qxb5#
- 1...Bd1
- 2.Qe4#
- 1...Be2
- 2.Qe4#
- 1...Be4
- 2.Qxe4#
- 1...Bg4
- 2.Qe4#
- 1...Bh5
- 2.Qe4#
- 1...Bh4
- 2.Sxb6#
- 2.Sc7#
- 1...Bg5
- 2.Sxb6#
- 2.Sc7#
- 1...Bf6
- 2.Sxb6#
- 2.Sc7#
- 1...Bc7
- 2.Sxc7#
- 1...Be7
- 2.Sxb6#
- 2.Sc7#
- 1...Sg6
- 2.Bxf7#
- 1...a3
- 2.Qb3#
- 1...e4
- 2.Qd4#
- 1...Ra6
- Tries
- 1.Kg3?
- 1...Rxa8
- 2.Qxb5#
- 1...e4
- 2.Qd4#
- 1...Ra6
- 2.Qxb5#
- 1...Ra7
- 2.Qxb5#
- 1...Bd1
- 2.Qe4#
- 1...Be2
- 2.Qe4#
- 1...Be4
- 2.Qxe4#
- 1...Bg4
- 2.Qe4#
- 1...Bh5
- 2.Qe4#
- 1...Bg5
- 2.Sxb6#
- 2.Sc7#
- 1...Bf6
- 2.Sxb6#
- 2.Sc7#
- 1...Bc7
- 2.Sxc7#
- 1...Be7
- 2.Sxb6#
- 2.Sc7#
- 1...Sg6
- 2.Bxf7#
- 1...a3
- 2.Qb3#
- 1...Bh4+!
- 1...Rxa8
- 1.Kh3?
- 1...Rxa8
- 2.Qxb5#
- 1...e4
- 2.Qd4#
- 1...Ra6
- 2.Qxb5#
- 1...Ra7
- 2.Qxb5#
- 1...Bd1
- 2.Qe4#
- 1...Be2
- 2.Qe4#
- 1...Be4
- 2.Qxe4#
- 1...Bh5
- 2.Qe4#
- 1...Bh4
- 2.Sxb6#
- 2.Sc7#
- 1...Bg5
- 2.Sxb6#
- 2.Sc7#
- 1...Bf6
- 2.Sxb6#
- 2.Sc7#
- 1...Bc7
- 2.Sxc7#
- 1...Be7
- 2.Sxb6#
- 2.Sc7#
- 1...Sg6
- 2.Bxf7#
- 1...a3
- 2.Qb3#
- 1...Bg4+!
- 1...Rxa8
- 1.Rxf3?
- threat
- 2.Qe4#
- 1...e4
- 2.Qxe4#
- 1...Kc6!
- threat
- 1.Rc7?
- threat
- 2.Sxb6#
- 1...Rxa8
- 2.Qxb5#
- 1...e4
- 2.Qd4#
- 1...Ra6
- 2.Qxb5#
- 1...Bxc7!
- threat
- 1.Rc8?
- 1...Rxa8
- 2.Qxb5#
- 1...e4
- 2.Qd4#
- 1...Ra6
- 2.Qxb5#
- 1...Ra7
- 2.Qxb5#
- 1...Bd1
- 2.Qe4#
- 1...Be2
- 2.Qe4#
- 1...Be4
- 2.Qxe4#
- 1...Bg4
- 2.Qe4#
- 1...Bh5
- 2.Qe4#
- 1...Bh4
- 2.Sxb6#
- 1...Bg5
- 2.Sxb6#
- 1...Bf6
- 2.Sxb6#
- 1...Be7
- 2.Sxb6#
- 1...Sg6
- 2.Bxf7#
- 1...a3
- 2.Qb3#
- 1...Bc7!
- 1...Rxa8
- 1.Kg3?
- Keys
- 1.Sc4!
- threat
- 2.Se3#
- 1...Ke4
- 2.Se3#
- 1...Kc6
- 2.Scxb6#
- 1...bxc4
- 2.Qxc4#
- 1...Bg5
- 2.Scxb6#
- 1...e4
- 2.Qxd6#
- threat
- 1.Sc4!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 1
- ADDED MATES = 4
- REMOVED MATES = 11
- Sets
- R(d);N_GUARD::QAR2(F),XP(e)
- R(d);N_GUARD,XS(H)::QAR2(F),XP(e)
- B(b);N_GUARD::QAB1(F)
- B(b);N_GUARD::QAB1(F),XB(b)
- B(l);N_GUARD::S(H),XB(l)
- S(m);N_GUARD::B(I),XS(k)
- P(c);N_GUARD::QAB(F)
- P(g);N_GUARD::QAR1(F)
- Tries
- Try
- K(D);S_FLIGHT
- Vars
- R(d);N_GUARD,XS(H)::QAR2(F),XP(e)
- P(g);N_GUARD::QAR1(F)
- R(d);N_GUARD::QAR2(F),XP(e)
- B(b);N_GUARD::QAB1(F)
- B(b);N_GUARD::QAB1(F),XB(b)
- B(l);N_GUARD::S(H),XB(l)
- S(m);N_GUARD::B(I),XS(k)
- P(c);N_GUARD::QAB(F)
- Refutation
- B(l);CHECK
- Try
- K(D);P-FLIGHT
- Vars
- R(d);N_GUARD,XS(H)::QAR2(F),XP(e)
- P(g);N_GUARD::QAR1(F)
- R(d);N_GUARD::QAR2(F),XP(e)
- B(b);N_GUARD::QAB1(F)
- B(b);N_GUARD::QAB1(F),XB(b)
- B(l);N_GUARD::S(H),XB(l)
- S(m);N_GUARD::B(I),XS(k)
- P(c);N_GUARD::QAB(F)
- Refutation
- B(b);CHECK
- Try
- R(E);XB(b)
- Threat
- QAB1(F)
- Vars
- P(g);::QAB1(F),XP(g)
- Refutation
- K(f);N_SPINS(k),S_FLIGHT
- Try
- R(E);
- Threat
- S(H),XP(h)
- Vars
- R(d);N_GUARD,XS(H)::QAR2(F),XP(e)
- P(g);N_GUARD::QAR1(F)
- R(d);N_GUARD::QAR2(F),XP(e)
- Refutation
- B(l);XR(E)
- Try
- R(E);
- Vars
- R(d);N_GUARD,XS(H)::QAR2(F),XP(e)
- P(g);N_GUARD::QAR1(F)
- R(d);N_GUARD::QAR2(F),XP(e)
- B(b);N_GUARD::QAB1(F)
- B(b);N_GUARD::QAB1(F),XB(b)
- B(l);N_GUARD::S(H),XP(h)
- S(m);N_GUARD::B(I),XS(k)
- P(c);N_GUARD::QAB(F)
- Refutation
- B(l);
- Try
- Actual
- S(C);
- Threat
- S(C)
- Vars
- K(f);N_SPINS(k),S_FLIGHT::QAR(F)+S(C)
- K(f);N_SPINS(k),S_FLIGHT::R(E)+S(C),XP(h)
- P(e);OGATE,XS(C)::QAB1(F),XP(e)
- B(l);N_GUARD::S(C),XP(h)
- P(g);SBLOCK::QAR1(F),XP(i)
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).