MESON Chess Problem Database
Problem Display
PID: 268041 (8/p5p1/P3QpN1/b1k2K2/Pn2p3/PR2P1p1/1N2n1B1/6B1 w - - 0 1)
Saunders, Denis M
The Problemist, 1999
#2
11 + 9
SOLUTION
- SOUND
- Sets
- 1...Bb6
- 2.axb4#
- 1...Bc7
- 2.axb4#
- 1...Bd8
- 2.axb4#
- 1...Sc1
- 2.Rc3#
- 1...Sxg1
- 2.Rc3#
- 1...Sc3
- 2.Rxc3#
- 1...Sd4+
- 2.exd4#
- 1...Sf4
- 2.Rc3#
- 1...Sa2
- 2.Rb5#
- 1...Sc2
- 2.Rb5#
- 1...Sd3
- 2.Rb5#
- 1...Sd5
- 2.Rb5#
- 1...Sxa6
- 2.Rb5#
- 1...Sc6
- 2.Rb5#
- 1...Bb6
- Tries
- 1.Kxe4?
- 1...Sc3+
- 2.Rxc3#
- 1...Sxg1
- 2.Rc3#
- 1...Sxa6
- 2.Sd3#
- 2.Rb5#
- 2.Qd5#
- 1...Bb6
- 2.axb4#
- 1...Bc7
- 2.axb4#
- 1...Bd8
- 2.axb4#
- 1...Sc1
- 2.Rc3#
- 1...Sd4
- 2.Rc3#
- 2.exd4#
- 1...Sf4
- 2.Rc3#
- 2.exf4#
- 1...Sa2
- 2.Sd3#
- 2.Rb5#
- 2.Qd5#
- 1...Sc2
- 2.Sd3#
- 2.Rb5#
- 2.Qd5#
- 1...Sd3
- 2.Sxd3#
- 2.Rb5#
- 2.Qd5#
- 1...Sd5
- 2.Rb5#
- 2.Qxd5#
- 1...Sc6
- 2.Sd3#
- 2.Rb5#
- 2.Qd5#
- 1...f5+!
- 1...Sc3+
- 1.Kg4?
- 1...Sxg1
- 2.Rc3#
- 1...Sxa6
- 2.Rb5#
- 1...Bb6
- 2.axb4#
- 1...Bc7
- 2.axb4#
- 1...Bd8
- 2.axb4#
- 1...Sc1
- 2.Rc3#
- 1...Sc3
- 2.Rxc3#
- 1...Sd4
- 2.Rc3#
- 2.exd4#
- 1...Sf4
- 2.Rc3#
- 1...Sa2
- 2.Rb5#
- 1...Sc2
- 2.Rb5#
- 1...Sd3
- 2.Rb5#
- 1...Sd5
- 2.Rb5#
- 1...Sc6
- 2.Rb5#
- 1...f5+!
- 1...Sxg1
- 1.Sd1?
- 1...Sd4+
- 2.exd4#
- 1...Sxg1
- 2.Rc3#
- 1...Sxa6
- 2.Rb5#
- 1...Bb6
- 2.axb4#
- 1...Bc7
- 2.axb4#
- 1...Bd8
- 2.axb4#
- 1...Sc1
- 2.Rc3#
- 1...Sc3
- 2.Rxc3#
- 1...Sf4
- 2.Rc3#
- 1...Sa2
- 2.Rb5#
- 1...Sc2
- 2.Rb5#
- 1...Sd3
- 2.Rb5#
- 1...Sc6
- 2.Rb5#
- 1...Sd5!
- 1...Sd4+
- 1.Sd3+?
- 1...Sxd3
- 2.Rb5#
- 1...exd3!
- 1...Sxd3
- 1.Sf8?
- threat
- 2.Sd7#
- 1...Sd4+
- 2.exd4#
- 1...g6+!
- threat
- 1.Bf2?
- 1...Sd4+
- 2.exd4#
- 1...Sxa6
- 2.Rb5#
- 1...Bb6
- 2.axb4#
- 1...Bc7
- 2.axb4#
- 1...Bd8
- 2.axb4#
- 1...Sc1
- 2.Rc3#
- 1...Sg1
- 2.Rc3#
- 1...Sc3
- 2.Rxc3#
- 1...Sf4
- 2.Rc3#
- 1...Sa2
- 2.Rb5#
- 1...Sc2
- 2.Rb5#
- 1...Sd3
- 2.Rb5#
- 1...Sd5
- 2.Rb5#
- 1...Sc6
- 2.Rb5#
- 1...gxf2!
- 1...Sd4+
- 1.Bf1?
- 1...Sd4+
- 2.exd4#
- 1...Sxg1
- 2.Rc3#
- 1...Sxa6
- 2.Rb5#
- 1...Bb6
- 2.axb4#
- 1...Bc7
- 2.axb4#
- 1...Bd8
- 2.axb4#
- 1...Sc1
- 2.Rc3#
- 1...Sc3
- 2.Rxc3#
- 1...Sf4
- 2.Rc3#
- 1...Sa2
- 2.Rb5#
- 1...Sc2
- 2.Rb5#
- 1...Sd3
- 2.Rb5#
- 1...Sd5
- 2.Rb5#
- 1...Sc6
- 2.Rb5#
- 1...g2!
- 1...Sd4+
- 1.Bh1?
- 1...Sd4+
- 2.exd4#
- 1...Sxg1
- 2.Rc3#
- 1...Sxa6
- 2.Rb5#
- 1...Bb6
- 2.axb4#
- 1...Bc7
- 2.axb4#
- 1...Bd8
- 2.axb4#
- 1...Sc1
- 2.Rc3#
- 1...Sc3
- 2.Rxc3#
- 1...Sf4
- 2.Rc3#
- 1...Sa2
- 2.Rb5#
- 1...Sc2
- 2.Rb5#
- 1...Sd3
- 2.Rb5#
- 1...Sd5
- 2.Rb5#
- 1...Sc6
- 2.Rb5#
- 1...g2!
- 1...Sd4+
- 1.Bh3?
- 1...Sd4+
- 2.exd4#
- 1...Sxg1
- 2.Rc3#
- 1...Sxa6
- 2.Rb5#
- 1...Bb6
- 2.axb4#
- 1...Bc7
- 2.axb4#
- 1...Bd8
- 2.axb4#
- 1...Sc1
- 2.Rc3#
- 1...Sc3
- 2.Rxc3#
- 1...Sf4
- 2.Rc3#
- 1...Sa2
- 2.Rb5#
- 1...Sc2
- 2.Rb5#
- 1...Sd3
- 2.Rb5#
- 1...Sd5
- 2.Rb5#
- 1...Sc6
- 2.Rb5#
- 1...g2!
- 1...Sd4+
- 1.Bxe4?
- 1...Sd4+
- 2.exd4#
- 1...Sxg1
- 2.Rc3#
- 1...Sxa6
- 2.Sd3#
- 2.Rb5#
- 2.Qd5#
- 2.Qc6#
- 2.Qe7#
- 1...Bb6
- 2.Qe7#
- 2.axb4#
- 1...Bc7
- 2.axb4#
- 1...Bd8
- 2.axb4#
- 1...Sc1
- 2.Rc3#
- 1...Sc3
- 2.Rxc3#
- 1...Sf4
- 2.Rc3#
- 2.exf4#
- 1...Sa2
- 2.Sd3#
- 2.Rb5#
- 2.Qd5#
- 2.Qc6#
- 2.Qe7#
- 1...Sc2
- 2.Sd3#
- 2.Rb5#
- 2.Qd5#
- 2.Qc6#
- 2.Qe7#
- 1...Sd3
- 2.Sxd3#
- 2.Rb5#
- 2.Qd5#
- 2.Qc6#
- 2.Qe7#
- 1...Sd5
- 2.Rb5#
- 2.Qxd5#
- 1...Sc6
- 2.Sd3#
- 2.Rb5#
- 2.Qd5#
- 2.Qxc6#
- 1...g2!
- 1...Sd4+
- 1.Rxb4?
- threat
- 2.Rc4#
- 2.Rb5#
- 1...Sd4+
- 2.exd4#
- 1...Sc3
- 2.Rc4#
- 1...Bxb4!
- threat
- 1.Qe7+?
- 1...Kd5
- 2.Bxe4#
- 1...Kb6
- 2.Qd6#
- 1...Kc6!
- 1...Kd5
- 1.Kxe4?
- Keys
- 1.Qxe4!
- 1...Sd4+
- 2.Qxd4#
- 1...Kb6
- 2.Qc6#
- 1...Kd6
- 2.Qe7#
- 1...Sxg1
- 2.Qd4#
- 1...Sxa6
- 2.Qd5#
- 2.Qc6#
- 2.Qe7#
- 1...Bb6
- 2.Qxb4#
- 2.Qe7#
- 1...Bc7
- 2.Qxb4#
- 1...Bd8
- 2.Qxb4#
- 1...Sc1
- 2.Qd4#
- 1...Sc3
- 2.Qd4#
- 1...Sf4
- 2.Qd4#
- 1...Sa2
- 2.Qd5#
- 2.Qc6#
- 2.Qe7#
- 1...Sc2
- 2.Qd5#
- 2.Qc6#
- 2.Qe7#
- 1...Sd3
- 2.Qd5#
- 2.Qc6#
- 2.Qe7#
- 1...Sd5
- 2.Qxd5#
- 1...Sc6
- 2.Qd5#
- 2.Qxc6#
- 1...Sd4+
- 1.Qxe4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 8
- ADDED MATES = 2
- REMOVED MATES = 6
- Sets
- B(e);N_GUARD::P(D),XS(c)
- S(a);N_GUARD::R(E)
- S(a);N_GUARD,XB(A)::R(E)
- S(a);N_GUARD::R(E),XS(a)
- S(a);CHECK,OGATE::P(F),XS(a)
- S(c);OGATE::R1(E)
- S(c);OGATE,XP(I)::R1(E)
- Tries
- Try
- K(H);S_FLIGHT,XP(d)
- Vars
- S(a);CHECK,N_GUARD::R(E),XS(a)
- S(a);N_GUARD,XB(A)::R(E)
- B(e);N_GUARD::P(D),XS(c)
- S(a);N_GUARD::R(E)
- Refutation
- P(g);CHECK
- Try
- K(H);S_FLIGHT
- Vars
- S(a);N_GUARD,XB(A)::R(E)
- S(c);OGATE,XP(I)::R1(E)
- B(e);N_GUARD::P(D),XS(c)
- S(a);N_GUARD::R(E)
- S(a);N_GUARD::R(E),XS(a)
- S(c);OGATE::R1(E)
- Refutation
- P(g);CHECK
- Try
- S(B);
- Vars
- S(a);CHECK,OGATE::P(F),XS(a)
- S(a);N_GUARD,XB(A)::R(E)
- S(c);OGATE,XP(I)::R1(E)
- B(e);N_GUARD::P(D),XS(c)
- S(a);N_GUARD::R(E)
- S(a);N_GUARD::R(E),XS(a)
- S(c);OGATE::R1(E)
- Refutation
- S(c);
- Try
- S(B);CHECK
- Vars
- S(c);OGATE,XS(B)::R1(E)
- Refutation
- P(d);XS(B)
- Try
- S(K);
- Threat
- S(K)
- Vars
- S(a);CHECK,OGATE::P(F),XS(a)
- Refutation
- P(i);CHECK
- Try
- B(A);
- Vars
- S(a);CHECK,OGATE::P(F),XS(a)
- S(c);OGATE,XP(I)::R1(E)
- B(e);N_GUARD::P(D),XS(c)
- S(a);N_GUARD::R(E)
- S(a);N_GUARD::R(E),XS(a)
- S(c);OGATE::R1(E)
- Refutation
- P(b);XB(A)
- Try
- B(C);
- Vars
- S(a);CHECK,OGATE::P(F),XS(a)
- S(a);N_GUARD,XB(A)::R(E)
- S(c);OGATE,XP(I)::R1(E)
- B(e);N_GUARD::P(D),XS(c)
- S(a);N_GUARD::R(E)
- S(a);N_GUARD::R(E),XS(a)
- S(c);OGATE::R1(E)
- Refutation
- P(b);
- Try
- B(C);
- Vars
- S(a);CHECK,OGATE::P(F),XS(a)
- S(a);N_GUARD,XB(A)::R(E)
- S(c);OGATE,XP(I)::R1(E)
- B(e);N_GUARD::P(D),XS(c)
- S(a);N_GUARD::R(E)
- S(a);N_GUARD::R(E),XS(a)
- S(c);OGATE::R1(E)
- Refutation
- P(b);
- Try
- B(C);
- Vars
- S(a);CHECK,OGATE::P(F),XS(a)
- S(a);N_GUARD,XB(A)::R(E)
- S(c);OGATE,XP(I)::R1(E)
- B(e);N_GUARD::P(D),XS(c)
- S(a);N_GUARD::R(E)
- S(a);N_GUARD::R(E),XS(a)
- S(c);OGATE::R1(E)
- Refutation
- P(b);
- Try
- B(C);XP(d)
- Vars
- S(a);CHECK,OGATE::P(F),XS(a)
- S(a);N_GUARD,XB(A)::R(E)
- B(e);N_GUARD::P(D),XS(c)
- S(a);N_GUARD::R(E)
- S(a);N_GUARD::R(E),XS(a)
- Refutation
- P(b);
- Try
- R(E);XS(c)
- Threat
- DUALS(2)
- Vars
- S(a);CHECK,OGATE::P(F),XS(a)
- S(a);::R1(E)
- Refutation
- B(e);XR(E)
- Try
- Q(J);CHECK
- Vars
- K(f);N_GUARD,P-FLIGHT,P_SPINP(d)::B(C),XP(d)
- K(f);N_GUARD,P_SPINS(c),S_FLIGHT::QAR2(J)
- Refutation
- K(f);P-FLIGHT,P_SPINP(d)
- Try
- Actual
- Q(J);XP(d)
- Vars
- S(a);CHECK,N_GUARD::QAB1(J),XS(a)
- K(f);P_SPINS(c),S_FLIGHT::QAR1(J)
- K(f);N_GUARD,S_FLIGHT::QAB1(J)
- S(a);N_GUARD,XB(A)::QAB1(J)
- B(e);N_GUARD::QAB1(J),XS(c)
- S(a);N_GUARD::QAB1(J)
- S(c);N_GUARD::QAR1(J),XS(c)
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).