MESON Chess Problem Database
Problem Display
PID: 18453 (8/2Nb4/8/R1pppRN1/3k4/1P6/1n1K4/Q2n4 w - - 0 1)
Sumner, Christopher Richard Benson
Time & Tide, 1955
#2
7 + 7
SOLUTION
- SOUND
- Sets
- 1...Ba4
- 2.Sce6#
- 1...Bb5
- 2.Sxb5#
- 2.Sce6#
- 1...Bxf5
- 2.Sb5#
- 1...Bc6
- 2.Sce6#
- 1...Be6
- 2.Sb5#
- 2.Scxe6#
- 1...Bc8
- 2.Sb5#
- 1...Be8
- 2.Sce6#
- 1...Sf2
- 2.Qxb2#
- 1...Sc3
- 2.Qg1#
- 1...Se3
- 2.Qxb2#
- 1...c4
- 2.Rxd5#
- 1...e4
- 2.Rxd5#
- 1...Ba4
- Tries
- 1.Ra2?
- 1...Bxf5
- 2.Sb5#
- 1...Ba4
- 2.Sce6#
- 1...Bb5
- 2.Sxb5#
- 2.Sce6#
- 1...Bc6
- 2.Sce6#
- 1...Be6
- 2.Sb5#
- 2.Scxe6#
- 1...Bc8
- 2.Sb5#
- 1...Be8
- 2.Sce6#
- 1...Sf2
- 2.Qxb2#
- 1...Sc3
- 2.Qg1#
- 1...Se3
- 2.Qxb2#
- 1...e4
- 2.Rxd5#
- 1...c4!
- 1...Bxf5
- 1.Ra3?
- 1...Bxf5
- 2.Sb5#
- 1...Ba4
- 2.Sce6#
- 1...Bb5
- 2.Sxb5#
- 2.Sce6#
- 1...Bc6
- 2.Sce6#
- 1...Be6
- 2.Sb5#
- 2.Scxe6#
- 1...Bc8
- 2.Sb5#
- 1...Be8
- 2.Sce6#
- 1...Sf2
- 2.Qxb2#
- 1...Sc3
- 2.Qg1#
- 1...Se3
- 2.Qxb2#
- 1...e4
- 2.Rxd5#
- 1...c4!
- 1...Bxf5
- 1.Ra4+?
- 1...Bxa4
- 2.Sce6#
- 1...c4!
- 1...Bxa4
- 1.Ra6?
- 1...Bxf5
- 2.Sb5#
- 1...Ba4
- 2.Sce6#
- 1...Bb5
- 2.Sxb5#
- 2.Sce6#
- 1...Bc6
- 2.Sce6#
- 1...Be6
- 2.Sb5#
- 2.Scxe6#
- 1...Bc8
- 2.Sb5#
- 1...Be8
- 2.Sce6#
- 1...Sf2
- 2.Qxb2#
- 1...Sc3
- 2.Qg1#
- 1...Se3
- 2.Qxb2#
- 1...e4
- 2.Rxd5#
- 1...c4!
- 1...Bxf5
- 1.Ra7?
- 1...Bxf5
- 2.Sb5#
- 1...Ba4
- 2.Sce6#
- 1...Bb5
- 2.Sxb5#
- 2.Sce6#
- 1...Bc6
- 2.Sce6#
- 1...Be6
- 2.Sb5#
- 2.Scxe6#
- 1...Bc8
- 2.Sb5#
- 1...Be8
- 2.Sce6#
- 1...Sf2
- 2.Qxb2#
- 1...Sc3
- 2.Qg1#
- 1...Se3
- 2.Qxb2#
- 1...e4
- 2.Rxd5#
- 1...c4!
- 1...Bxf5
- 1.Rf3?
- threat
- 2.Rd3#
- 1...Bb5
- 2.Sxb5#
- 2.Sce6#
- 1...Bf5
- 2.Sb5#
- 1...Sf2
- 2.Qxb2#
- 1...Sc3
- 2.Qg1#
- 1...Se3
- 2.Qxb2#
- 1...c4
- 2.Rxd5#
- 1...e4!
- threat
- 1.Rf4+?
- 1...e4
- 2.Sf3#
- 1...exf4!
- 1...e4
- 1.Rxe5?
- threat
- 2.Sf3#
- 2.Rxd5#
- 1...Bg4
- 2.Rxd5#
- 1...Bc6
- 2.Sf3#
- 1...Be6
- 2.Sf3#
- 1...Sc3
- 2.Sf3#
- 1...Se3
- 2.Sf3#
- 2.Qxb2#
- 1...Kxe5!
- threat
- 1.Rf6?
- 1...Ba4
- 2.Sce6#
- 1...Bh3
- 2.Sb5#
- 1...Bg4
- 2.Sb5#
- 1...Bb5
- 2.Sxb5#
- 2.Sce6#
- 1...Bf5
- 2.Sb5#
- 1...Bc6
- 2.Sce6#
- 1...Be6
- 2.Sb5#
- 2.Scxe6#
- 1...Bc8
- 2.Sb5#
- 1...Be8
- 2.Sce6#
- 1...Sf2
- 2.Qxb2#
- 1...Sc3
- 2.Qg1#
- 1...Se3
- 2.Qxb2#
- 1...c4
- 2.Rxd5#
- 1...e4!
- 1...Ba4
- 1.Rf7?
- 1...Ba4
- 2.Sce6#
- 1...Bh3
- 2.Sb5#
- 1...Bg4
- 2.Sb5#
- 1...Bb5
- 2.Sxb5#
- 2.Sce6#
- 1...Bf5
- 2.Sb5#
- 1...Bc6
- 2.Sce6#
- 1...Be6
- 2.Sb5#
- 2.Scxe6#
- 1...Bc8
- 2.Sb5#
- 1...Be8
- 2.Sce6#
- 1...Sf2
- 2.Qxb2#
- 1...Sc3
- 2.Qg1#
- 1...Se3
- 2.Qxb2#
- 1...c4
- 2.Rxd5#
- 1...e4!
- 1...Ba4
- 1.Rf8?
- 1...Ba4
- 2.Sce6#
- 1...Bh3
- 2.Sb5#
- 1...Bg4
- 2.Sb5#
- 1...Bb5
- 2.Sxb5#
- 2.Sce6#
- 1...Bf5
- 2.Sb5#
- 1...Bc6
- 2.Sce6#
- 1...Be6
- 2.Sb5#
- 2.Scxe6#
- 1...Bc8
- 2.Sb5#
- 1...Be8
- 2.Sce6#
- 1...Sf2
- 2.Qxb2#
- 1...Sc3
- 2.Qg1#
- 1...Se3
- 2.Qxb2#
- 1...c4
- 2.Rxd5#
- 1...e4!
- 1...Ba4
- 1.Qxb2+?
- 1...Sc3
- 2.Qxc3#
- 1...Sxb2!
- 1...Sc3
- 1.Qb1?
- threat
- 2.Sf3#
- 1...Sd3
- 2.Qxd3#
- 1...e4
- 2.Rxd5#
- 1...Sc4+!
- threat
- 1.Ra2?
- Keys
- 1.Ra8!
- 1...Bxf5
- 2.Sb5#
- 1...c4
- 2.Qa7#
- 1...Ba4
- 2.Sce6#
- 1...Bb5
- 2.Sxb5#
- 2.Sce6#
- 1...Bc6
- 2.Sce6#
- 1...Be6
- 2.Sb5#
- 2.Scxe6#
- 1...Bc8
- 2.Sb5#
- 1...Be8
- 2.Sce6#
- 1...Sf2
- 2.Qxb2#
- 1...Sc3
- 2.Qg1#
- 1...Se3
- 2.Qxb2#
- 1...e4
- 2.Rxd5#
- 1...Bxf5
- 1.Ra8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- B(g);N_GUARD::S(G)
- B(g);N_GUARD,XR(E)::S(G)
- S(a);N_GUARD::QAB(A),XS(b)
- S(a);N_SPINS(b),OGATE::QAB(A)
- P(d);OGATE::R1(D),XP(e)
- P(f);OGATE::R1(E),XP(e)
- Tries
- Try
- R(D);
- Vars
- B(g);N_GUARD,XR(E)::S(G)
- B(g);N_GUARD::S(G)
- S(a);N_GUARD::QAB(A),XS(b)
- S(a);N_SPINS(b),OGATE::QAB(A)
- P(f);OGATE::R1(E),XP(e)
- Refutation
- P(d);
- Try
- R(D);
- Vars
- B(g);N_GUARD,XR(E)::S(G)
- B(g);N_GUARD::S(G)
- S(a);N_GUARD::QAB(A),XS(b)
- S(a);N_SPINS(b),OGATE::QAB(A)
- P(f);OGATE::R1(E),XP(e)
- Refutation
- P(d);
- Try
- R(D);CHECK
- Vars
- B(g);XR(D)::S(G)
- Refutation
- P(d);P_SPINP(d)
- Try
- R(D);
- Vars
- B(g);N_GUARD,XR(E)::S(G)
- B(g);N_GUARD::S(G)
- S(a);N_GUARD::QAB(A),XS(b)
- S(a);N_SPINS(b),OGATE::QAB(A)
- P(f);OGATE::R1(E),XP(e)
- Refutation
- P(d);
- Try
- R(D);
- Vars
- B(g);N_GUARD,XR(E)::S(G)
- B(g);N_GUARD::S(G)
- S(a);N_GUARD::QAB(A),XS(b)
- S(a);N_SPINS(b),OGATE::QAB(A)
- P(f);OGATE::R1(E),XP(e)
- Refutation
- P(d);
- Try
- R(E);
- Threat
- R1(E)
- Vars
- B(g);N_GUARD::S(G)
- S(a);N_GUARD::QAB(A),XS(b)
- S(a);N_SPINS(b),OGATE::QAB(A)
- P(d);OGATE::R1(D),XP(e)
- Refutation
- P(f);
- Try
- R(E);CHECK
- Vars
- P(f);P_SPINP(f)::S(F)
- Refutation
- P(f);XR(E)
- Try
- R(E);XP(f)
- Threat
- DUALS(2)
- Vars
- B(g);::R1(E),XP(e)
- B(g);::S(F)
- S(a);N_SPINS(b)::S(F)
- Refutation
- K(c);S_FLIGHT,XR(E)
- Try
- R(E);
- Vars
- B(g);N_GUARD::S(G)
- S(a);N_GUARD::QAB(A),XS(b)
- S(a);N_SPINS(b),OGATE::QAB(A)
- P(d);OGATE::R1(D),XP(e)
- Refutation
- P(f);
- Try
- R(E);
- Vars
- B(g);N_GUARD::S(G)
- S(a);N_GUARD::QAB(A),XS(b)
- S(a);N_SPINS(b),OGATE::QAB(A)
- P(d);OGATE::R1(D),XP(e)
- Refutation
- P(f);
- Try
- R(E);
- Vars
- B(g);N_GUARD::S(G)
- S(a);N_GUARD::QAB(A),XS(b)
- S(a);N_SPINS(b),OGATE::QAB(A)
- P(d);OGATE::R1(D),XP(e)
- Refutation
- P(f);
- Try
- Q(A);CHECK,XS(b)
- Vars
- S(a);N_GUARD,P_SPINS(a)::QAB1(A),XS(a)
- Refutation
- S(a);XQ(A)
- Try
- Q(A);N_PINS(b)
- Threat
- S(F)
- Vars
- S(b);N_GUARD::QAR1(A),XS(b)
- P(f);OGATE::R1(E),XP(e)
- Refutation
- S(b);CHECK
- Try
- Actual
- R(D);
- Vars
- B(g);N_GUARD,XR(E)::S(G)
- P(d);OGATEB::QAB(A)
- B(g);N_GUARD::S(G)
- S(a);N_GUARD::QAB(A),XS(b)
- S(a);N_SPINS(b),OGATE::QAB(A)
- P(f);OGATE::R1(E),XP(e)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
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