MESON Chess Problem Database
Problem Display
PID: 51587 (8/4N1p1/4p1P1/2b5/3pk1N1/3n1R2/2Q1P3/1Kn5 w - - 0 1)
Goldstein, Alexander
Lewis, Robert Tony
The Guardian, 1966
#2
7 + 7
SOLUTION
- SOUND
- Sets
- 1...Ba3
- 2.Qc6#
- 1...Bb4
- 2.Qc6#
- 1...Bb6
- 2.Qc6#
- 1...Bd6
- 2.Qc6#
- 1...Ba7
- 2.Qc6#
- 1...Bxe7
- 2.Qc6#
- 1...Sa2
- 2.Qxd3#
- 1...Sxe2
- 2.Qxd3#
- 2.Qxe2#
- 1...Sb3
- 2.Qxd3#
- 1...e5
- 2.Sf2#
- 1...Ba3
- Tries
- 1.Ka1?
- 1...Bxe7
- 2.Qc6#
- 1...Sxe2
- 2.Qxd3#
- 2.Qxe2#
- 1...Ba3
- 2.Qc6#
- 1...Bb4
- 2.Qc6#
- 1...Bb6
- 2.Qc6#
- 1...Bd6
- 2.Qc6#
- 1...Ba7
- 2.Qc6#
- 1...Sa2
- 2.Qxd3#
- 1...e5
- 2.Sf2#
- 1...Sb3+!
- 1...Bxe7
- 1.Rf1?
- 1...Bxe7
- 2.Qc6#
- 1...Sxe2
- 2.Qxe2#
- 1...Ba3
- 2.Qc6#
- 1...Bb4
- 2.Qc6#
- 1...Bb6
- 2.Qc6#
- 1...Bd6
- 2.Qc6#
- 1...Ba7
- 2.Qc6#
- 1...Sa2
- 2.Qxd3#
- 2.exd3#
- 1...Sb3
- 2.Qxd3#
- 2.exd3#
- 1...e5!
- 1...Bxe7
- 1.Rf2?
- 1...Bxe7
- 2.Qc6#
- 1...Sxe2
- 2.Qxe2#
- 1...Ba3
- 2.Qc6#
- 1...Bb4
- 2.Qc6#
- 1...Bb6
- 2.Qc6#
- 1...Bd6
- 2.Qc6#
- 1...Ba7
- 2.Qc6#
- 1...Sa2
- 2.Qxd3#
- 2.exd3#
- 1...Sb3
- 2.Qxd3#
- 2.exd3#
- 1...e5!
- 1...Bxe7
- 1.Rf7?
- 1...Bxe7
- 2.Qc6#
- 1...Sxe2
- 2.Qxe2#
- 1...Ba3
- 2.Qc6#
- 1...Bb4
- 2.Qc6#
- 1...Bb6
- 2.Qc6#
- 1...Bd6
- 2.Qc6#
- 1...Ba7
- 2.Qc6#
- 1...Sa2
- 2.Qxd3#
- 2.exd3#
- 1...Sb3
- 2.Qxd3#
- 2.exd3#
- 1...e5!
- 1...Bxe7
- 1.Rf8?
- 1...Bxe7
- 2.Qc6#
- 1...Sxe2
- 2.Qxe2#
- 1...Ba3
- 2.Qc6#
- 1...Bb4
- 2.Qc6#
- 1...Bb6
- 2.Qc6#
- 1...Bd6
- 2.Qc6#
- 1...Ba7
- 2.Qc6#
- 1...Sa2
- 2.Qxd3#
- 2.exd3#
- 1...Sb3
- 2.Qxd3#
- 2.exd3#
- 1...e5!
- 1...Bxe7
- 1.Qa4?
- threat
- 2.Qc6#
- 2.Qa8#
- 1...Ba7
- 2.Qc6#
- 1...Sf4
- 2.Re3#
- 1...Se5
- 2.Sf2#
- 1...Sb4!
- threat
- 1.Qxc5?
- threat
- 2.Qc6#
- 1...Sb4
- 2.Sf2#
- 2.Qe5#
- 1...Sf4
- 2.Sf2#
- 2.Qe5#
- 1...Se5
- 2.Sf2#
- 2.Qxe5#
- 1...Sxc5!
- threat
- 1.exd3+?
- 1...Sxd3
- 2.Qxd3#
- 2.Qe2#
- 1...Kxf3!
- 1...Sxd3
- 1.Ka1?
- Keys
- 1.Qc4!
- 1...Bxe7
- 2.Qc6#
- 1...Sxe2
- 2.Qxd3#
- 1...e5
- 2.Qd5#
- 1...Ba3
- 2.Qc6#
- 1...Bb4
- 2.Qc6#
- 1...Bb6
- 2.Qc6#
- 1...Bd6
- 2.Qc6#
- 1...Ba7
- 2.Qc6#
- 1...Sa2
- 2.Qxd3#
- 1...Sb3
- 2.Qxd3#
- 1...Se1
- 2.Qxe6#
- 1...Sb2
- 2.Qxe6#
- 1...Sf2
- 2.Qxe6#
- 1...Sb4
- 2.Qxe6#
- 1...Sf4
- 2.Re3#
- 1...Se5
- 2.Sf2#
- 1...Bxe7
- 1.Qc4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 7
- REMOVED MATES = 0
- Sets
- B(e);OGATE::QAB(B)
- B(e);OGATE,XS(G)::QAB(B)
- S(a);N_GUARD::QAB1(B),XS(b)
- P(f);SBLOCK::S(E)
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- B(e);OGATE,XS(G)::QAB(B)
- B(e);OGATE::QAB(B)
- S(a);N_GUARD::QAB1(B),XS(b)
- P(f);SBLOCK::S(E)
- Refutation
- S(a);CHECK
- Try
- R(D);
- Vars
- B(e);OGATE,XS(G)::QAB(B)
- S(a);OGATE,XP(C)::QAR2(B),XS(a)
- B(e);OGATE::QAB(B)
- Refutation
- P(f);
- Try
- R(D);
- Vars
- B(e);OGATE,XS(G)::QAB(B)
- S(a);OGATE,XP(C)::QAR2(B),XS(a)
- B(e);OGATE::QAB(B)
- Refutation
- P(f);
- Try
- R(D);
- Vars
- B(e);OGATE,XS(G)::QAB(B)
- S(a);OGATE,XP(C)::QAR2(B),XS(a)
- B(e);OGATE::QAB(B)
- Refutation
- P(f);
- Try
- R(D);
- Vars
- B(e);OGATE,XS(G)::QAB(B)
- S(a);OGATE,XP(C)::QAR2(B),XS(a)
- B(e);OGATE::QAB(B)
- Refutation
- P(f);
- Try
- Q(B);N_PINS(b),P_PINP(c)
- Threat
- DUALS(2)
- Vars
- B(e);::QAB(B)
- S(b);SBLOCK::R1(D)
- S(b);N_GUARD,SBLOCK::S(E)
- Refutation
- S(b);N_SPINP(c)
- Try
- Q(B);N_PINS(b),XB(e)
- Threat
- QAB(B)
- Refutation
- S(b);XQ(B)
- Try
- P(C);CHECK,XS(b)
- Refutation
- K(d);S_FLIGHT,XR(D)
- Try
- Actual
- Q(B);N_PINS(b),P_PINP(c)
- Vars
- B(e);OGATE,XS(G)::QAB(B)
- S(a);N_GUARD,XP(C)::QAB1(B),XS(b)
- P(f);N_GUARD::QAB1(B)
- B(e);OGATE::QAB(B)
- S(a);N_GUARD::QAB1(B),XS(b)
- S(b);N_GUARD::QAR2(B),XP(f)
- S(b);SBLOCK::R1(D)
- S(b);N_GUARD,SBLOCK::S(E)
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).