MESON Chess Problem Database
Problem Display
PID: 140684 (3N4/8/3p4/3pbR2/p2pkn1B/P2p1R1P/3K1P2/1Q6 w - - 0 1)
Rudd, Charles Dember
The Problemist, 1943
#2
9 + 8
SOLUTION
- SOUND
- Sets
- 1...Kxf3
- 2.Qh1#
- 1...Kxf5
- 2.Qxd3#
- 1...Bf6
- 2.R3xf4#
- 1...Bg7
- 2.R3xf4#
- 1...Bh8
- 2.R3xf4#
- 1...Se2
- 2.Qxd3#
- 1...Sg2
- 2.Qxd3#
- 1...Sxh3
- 2.Qxd3#
- 2.Qe1#
- 1...Sh5
- 2.Qxd3#
- 2.Qe1#
- 1...Se6
- 2.Qxd3#
- 2.Qe1#
- 1...Sg6
- 2.Qxd3#
- 2.Qe1#
- 1...Kxf3
- Tries
- 1.Kd1?
- 1...Kxf5
- 2.Qxd3#
- 1...Sxh3
- 2.Qxd3#
- 1...Bf6
- 2.R3xf4#
- 1...Bg7
- 2.R3xf4#
- 1...Bh8
- 2.R3xf4#
- 1...Se2
- 2.Qxd3#
- 1...Sg2
- 2.Qxd3#
- 1...Sh5
- 2.Qxd3#
- 1...Se6
- 2.Qxd3#
- 1...Sg6
- 2.Qxd3#
- 1...Kxf3!
- 1...Kxf5
- 1.Sc6?
- 1...Kxf3
- 2.Qh1#
- 1...Sxh3
- 2.Qxd3#
- 2.Qe1#
- 1...Bf6
- 2.R3xf4#
- 2.R5xf4#
- 1...Bg7
- 2.R3xf4#
- 2.R5xf4#
- 1...Bh8
- 2.R3xf4#
- 2.R5xf4#
- 1...Se2
- 2.Qxd3#
- 1...Sg2
- 2.Qxd3#
- 1...Sh5
- 2.Qxd3#
- 2.Qe1#
- 1...Se6
- 2.Qxd3#
- 2.Qe1#
- 1...Sg6
- 2.Qxd3#
- 2.Qe1#
- 1...Kxf5!
- 1...Kxf3
- 1.Se6?
- 1...Kxf3
- 2.Qh1#
- 1...Sxh3
- 2.Qxd3#
- 2.Qe1#
- 1...Sxe6
- 2.Qxd3#
- 2.Qe1#
- 1...Bf6
- 2.R3xf4#
- 1...Bg7
- 2.R3xf4#
- 1...Bh8
- 2.R3xf4#
- 1...Se2
- 2.Sg5#
- 2.Qxd3#
- 1...Sg2
- 2.Sg5#
- 2.Qxd3#
- 1...Sh5
- 2.Sg5#
- 2.Qxd3#
- 2.Qe1#
- 1...Sg6
- 2.Sg5#
- 2.Qxd3#
- 2.Qe1#
- 1...Kxf5!
- 1...Kxf3
- 1.Sb7?
- 1...Kxf3
- 2.Qh1#
- 1...Sxh3
- 2.Qxd3#
- 2.Qe1#
- 1...Bf6
- 2.R3xf4#
- 1...Bg7
- 2.R3xf4#
- 1...Bh8
- 2.R3xf4#
- 1...Se2
- 2.Qxd3#
- 1...Sg2
- 2.Qxd3#
- 1...Sh5
- 2.Qxd3#
- 2.Qe1#
- 1...Se6
- 2.Qxd3#
- 2.Qe1#
- 1...Sg6
- 2.Qxd3#
- 2.Qe1#
- 1...Kxf5!
- 1...Kxf3
- 1.Sf7?
- 1...Kxf3
- 2.Qh1#
- 1...Sxh3
- 2.Qxd3#
- 2.Qe1#
- 1...Bf6
- 2.R3xf4#
- 2.R5xf4#
- 1...Bg7
- 2.R3xf4#
- 2.R5xf4#
- 1...Bh8
- 2.R3xf4#
- 2.R5xf4#
- 1...Se2
- 2.Sg5#
- 2.Qxd3#
- 1...Sg2
- 2.Sg5#
- 2.Qxd3#
- 1...Sh5
- 2.Sg5#
- 2.Qxd3#
- 2.Qe1#
- 1...Se6
- 2.Qxd3#
- 2.Qe1#
- 1...Sg6
- 2.Sg5#
- 2.Qxd3#
- 2.Qe1#
- 1...Kxf5!
- 1...Kxf3
- 1.Bg3?
- 1...Kxf3
- 2.Qh1#
- 1...Sxh3
- 2.Qxd3#
- 2.Qe1#
- 1...Bf6
- 2.R3xf4#
- 1...Bg7
- 2.R3xf4#
- 1...Bh8
- 2.R3xf4#
- 1...Se2
- 2.Qxd3#
- 1...Sg2
- 2.Qxd3#
- 1...Sh5
- 2.Qxd3#
- 2.Qe1#
- 1...Se6
- 2.Qxd3#
- 2.Qe1#
- 1...Sg6
- 2.Qxd3#
- 2.Qe1#
- 1...Kxf5!
- 1...Kxf3
- 1.Be7?
- 1...Kxf5
- 2.Qxd3#
- 1...Sxh3
- 2.Qxd3#
- 2.Qe1#
- 1...Bf6
- 2.R3xf4#
- 1...Bg7
- 2.R3xf4#
- 1...Bh8
- 2.R3xf4#
- 1...Se2
- 2.Qxd3#
- 1...Sg2
- 2.Qxd3#
- 1...Sh5
- 2.Qxd3#
- 2.Qe1#
- 1...Se6
- 2.Qxd3#
- 2.Qe1#
- 1...Sg6
- 2.Qxd3#
- 2.Qe1#
- 1...Kxf3!
- 1...Kxf5
- 1.Rxd3?
- threat
- 2.Re3#
- 1...Sxd3
- 2.Qxd3#
- 1...Kxf5!
- threat
- 1.Rf6?
- 1...Kxf3
- 2.Qh1#
- 1...Sxh3
- 2.Qxd3#
- 2.Qe1#
- 1...Se2
- 2.Qxd3#
- 1...Sg2
- 2.Qxd3#
- 1...Sh5
- 2.Qxd3#
- 2.Qe1#
- 1...Se6
- 2.Qxd3#
- 2.Qe1#
- 1...Sg6
- 2.Qxd3#
- 2.Qe1#
- 1...Bxf6!
- 1...Kxf3
- 1.Qf1?
- 1...Kxf3
- 2.Qh1#
- 1...Kxf5
- 2.Qxd3#
- 1...Sxh3
- 2.Qxd3#
- 2.Qe1#
- 1...Bf6
- 2.R3xf4#
- 1...Bg7
- 2.R3xf4#
- 1...Bh8
- 2.R3xf4#
- 1...Sg2
- 2.Qxd3#
- 1...Sh5
- 2.Qxd3#
- 2.Qe1#
- 1...Se6
- 2.Qxd3#
- 2.Qe1#
- 1...Sg6
- 2.Qxd3#
- 2.Qe1#
- 1...Se2!
- 1...Kxf3
- 1.Qb3?
- 1...Kxf3
- 2.Qxd5#
- 1...Kxf5
- 2.Qxd3#
- 1...Sxh3
- 2.Qxd3#
- 1...Se2
- 2.Qxd3#
- 1...Bf6
- 2.R3xf4#
- 1...Bg7
- 2.R3xf4#
- 1...Bh8
- 2.R3xf4#
- 1...Sg2
- 2.Qxd3#
- 1...Sh5
- 2.Qxd3#
- 1...Se6
- 2.Qxd3#
- 1...Sg6
- 2.Qxd3#
- 1...axb3!
- 1...Kxf3
- 1.Kd1?
- Keys
- 1.Qb5!
- 1...Kxf3
- 2.Qxd5#
- 1...Kxf5
- 2.Qxd3#
- 1...Sxh3
- 2.Qxd3#
- 1...Se2
- 2.Qxd3#
- 1...Bf6
- 2.R3xf4#
- 1...Bg7
- 2.R3xf4#
- 1...Bh8
- 2.R3xf4#
- 1...Sg2
- 2.Qxd3#
- 1...Sh5
- 2.Qxd3#
- 1...Se6
- 2.Qxd3#
- 1...Sg6
- 2.Qxd3#
- 1...Kxf3
- 1.Qb5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- K(d);N_SPINP(a),OGATEB,P_SPINS(e),S_FLIGHT,XR(E)::QAB(A)
- K(d);P_SPINS(e),S_FLIGHT,XR(H)::QAB(A),XP(a)
- B(g);N_GUARD::R1(E),XS(e)
- S(e);N_GUARD::QAB1(A),XP(a)
- Tries
- Try
- K(B);P-FLIGHT
- Vars
- K(d);P_SPINS(e),S_FLIGHT,XR(H)::QAB(A),XP(a)
- S(e);N_GUARD,XP(F)::QAB1(A),XP(a)
- B(g);N_GUARD::R1(E),XS(e)
- S(e);N_GUARD::QAB1(A),XP(a)
- Refutation
- K(d);N_SPINP(a),P_SPINS(e),S_FLIGHT,XR(E)
- Try
- S(I);
- Vars
- K(d);N_SPINP(a),OGATEB,P_SPINS(e),S_FLIGHT,XR(E)::QAB(A)
- S(e);N_GUARD::QAB1(A),XP(a)
- Refutation
- K(d);P_SPINS(e),S_FLIGHT,XR(H)
- Try
- S(I);
- Vars
- K(d);N_SPINP(a),OGATEB,P_SPINS(e),S_FLIGHT,XR(E)::QAB(A)
- B(g);N_GUARD::R1(E),XS(e)
- Refutation
- K(d);P_SPINS(e),S_FLIGHT,XR(H)
- Try
- S(I);
- Vars
- K(d);N_SPINP(a),OGATEB,P_SPINS(e),S_FLIGHT,XR(E)::QAB(A)
- B(g);N_GUARD::R1(E),XS(e)
- S(e);N_GUARD::QAB1(A),XP(a)
- Refutation
- K(d);P_SPINS(e),S_FLIGHT,XR(H)
- Try
- S(I);
- Vars
- K(d);N_SPINP(a),OGATEB,P_SPINS(e),S_FLIGHT,XR(E)::QAB(A)
- Refutation
- K(d);P_SPINS(e),S_FLIGHT,XR(H)
- Try
- B(G);
- Vars
- K(d);N_SPINP(a),OGATEB,P_SPINS(e),S_FLIGHT,XR(E)::QAB(A)
- B(g);N_GUARD::R1(E),XS(e)
- S(e);N_GUARD::QAB1(A),XP(a)
- Refutation
- K(d);P_SPINS(e),S_FLIGHT,XR(H)
- Try
- B(G);
- Vars
- K(d);P_SPINS(e),S_FLIGHT,XR(H)::QAB(A),XP(a)
- B(g);N_GUARD::R1(E),XS(e)
- S(e);N_GUARD::QAB1(A),XP(a)
- Refutation
- K(d);N_SPINP(a),P_SPINS(e),S_FLIGHT,XR(E)
- Try
- R(E);XP(a)
- Threat
- QAB(A)+R(E),DCHECK
- Vars
- S(e);OGATE,P_SPINS(e),XR(E)::QAB1(A),XS(e)
- Refutation
- K(d);S_FLIGHT,XR(H)
- Try
- R(H);
- Vars
- K(d);N_SPINP(a),OGATEB,P_SPINS(e),S_FLIGHT,XR(E)::QAB(A)
- S(e);N_GUARD::QAB1(A),XP(a)
- Refutation
- B(g);XR(H)
- Try
- Q(A);N_PINP(a)
- Vars
- K(d);OGATEB,P_SPINS(e),S_FLIGHT,XR(E)::QAB(A)
- K(d);P_SPINS(e),S_FLIGHT,XR(H)::QAB(A),XP(a)
- B(g);N_GUARD::R1(E),XS(e)
- S(e);N_GUARD::QAB1(A),XP(a)
- Refutation
- S(e);
- Try
- Q(A);N_PINP(a)
- Vars
- K(d);P_SPINP(a),P_SPINS(e),S_FLIGHT,XR(E)::QAB(A),XP(f)
- K(d);P_SPINS(e),S_FLIGHT,XR(H)::QAB(A),XP(a)
- S(e);N_GUARD,XP(F)::QAB1(A),XP(a)
- S(e);N_GUARD::QAB1(A),XP(a)
- B(g);N_GUARD::R1(E),XS(e)
- Refutation
- P(b);XQ(A)
- Try
- Actual
- Q(A);N_PINP(a)
- Vars
- K(d);P_SPINS(e),S_FLIGHT,XR(E)::QAB(A),XP(f)
- K(d);P_SPINS(e),S_FLIGHT,XR(H)::QAB(A),XP(a)
- S(e);N_GUARD,XP(F)::QAB1(A),XP(a)
- S(e);N_GUARD::QAB1(A),XP(a)
- B(g);N_GUARD::R1(E),XS(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).