MESON Chess Problem Database

Problem Display
PID: 221329 (4R3/Qn6/3Pb3/p1P1k1Bp/K3B1pR/1P6/3N1P2/8 w - - 0 1)

Rudd, Charles Dember

The Problemist, 1944

4R3/Qn6/3Pb3/p1P1k1Bp/K3B1pR/1P6/3N1P2/8

#2

11 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Bf6#
    • 1...Sxc5+
      • 2.Qxc5#
    • 1...Sxd6
      • 2.Qg7#
    • 1...Sd8
      • 2.Qg7#
    • 1...g3
      • 2.Sf3#
  • Tries
    • 1.Ka3?
      • 1...Kd4
        • 2.Bf6#
      • 1...Sxc5
        • 2.Qxc5#
      • 1...Sxd6
        • 2.Qg7#
      • 1...Sd8
        • 2.Qg7#
      • 1...g3
        • 2.Sf3#
      • 1...a4!
    • 1.Rxg4?
      • threat
        • 2.Sf3#
      • 1...Sxc5+
        • 2.Qxc5#
      • 1...Kd4
        • 2.Bf6#
      • 1...hxg4!
    • 1.Rxh5?
      • 1...Sxc5+
        • 2.Qxc5#
      • 1...Kd4
        • 2.Bf6#
      • 1...Sxd6
        • 2.Qg7#
      • 1...Sd8
        • 2.Qg7#
      • 1...g3!
    • 1.Rxe6+?
      • 1...Kd4
        • 2.Bf6#
      • 1...Kxe6!
    • 1.Qb6?
      • 1...Sxc5+
        • 2.Qxc5#
      • 1...Kd4
        • 2.Bf6#
      • 1...Sxd6
        • 2.Qxd6#
      • 1...g3
        • 2.Sf3#
      • 1...Sd8!
    • 1.Qxa5?
      • threat
        • 2.Qc3#
      • 1...Sxc5+
        • 2.Qxc5#
      • 1...Kd4
        • 2.Bf6#
      • 1...Sxa5!
    • 1.f4+?
      • 1...gxf4 ep
        • 2.Sxf3#
      • 1...Kd4!
    • 1.b4?
      • 1...Sxc5+
        • 2.Qxc5#
      • 1...Kd4
        • 2.Bf6#
      • 1...Sxd6
        • 2.Qg7#
      • 1...g3
        • 2.Sf3#
      • 1...Sd8
        • 2.Qg7#
      • 1...axb4!
  • Keys
    • 1.c6!
      • 1...Sc5+
        • 2.Qxc5#
      • 1...Kxd6
        • 2.Bf4#
      • 1...Sxd6
        • 2.Qc5#
        • 2.Qg7#
      • 1...g3
        • 2.Sc4#
      • 1...Sd8
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(c);N_SPINB(e),S_FLIGHT::B(H)
    • S(f);CHECK,OGATE,XP(G)::QAR2(J),XS(f)
    • S(f);OGATE,XP(I)::QAB(J)
    • S(f);OGATE::QAB(J)
    • P(a);N_GUARD::S(A)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(c);N_SPINB(e),S_FLIGHT::B(H)
        • S(f);OGATE,XP(G)::QAR2(J),XS(f)
        • S(f);OGATE,XP(I)::QAB(J)
        • S(f);OGATE::QAB(J)
        • P(a);N_GUARD::S(A)
      • Refutation
        • P(b);
    • Try
      • R(F);XP(a)
      • Threat
        • S(A)
      • Vars
        • S(f);CHECK,OGATE,XP(G)::QAR2(J),XS(f)
        • K(c);N_SPINB(e),S_FLIGHT::B(H)
      • Refutation
        • P(d);XR(F)
    • Try
      • R(F);XP(d)
      • Vars
        • S(f);CHECK,OGATE,XP(G)::QAR2(J),XS(f)
        • K(c);N_SPINB(e),S_FLIGHT::B(H)
        • S(f);OGATE,XP(I)::QAB(J)
        • S(f);OGATE::QAB(J)
      • Refutation
        • P(a);
    • Try
      • R(K);CHECK,XB(e)
      • Vars
        • K(c);S_FLIGHT::B(H)
      • Refutation
        • K(c);P-FLIGHT,XR(K)
    • Try
      • Q(J);
      • Vars
        • S(f);CHECK,OGATE,XP(G)::QAR2(J),XS(f)
        • K(c);N_SPINB(e),S_FLIGHT::B(H)
        • S(f);OGATE,XP(I)::QAB1(J),XS(f)
        • P(a);N_GUARD::S(A)
      • Refutation
        • S(f);
    • Try
      • Q(J);XP(b)
      • Threat
        • QAB(J)
      • Vars
        • S(f);CHECK,OGATE,P_SPINS(f),XP(G)::QAR2(J),XS(f)
        • K(c);N_SPINB(e),S_FLIGHT::B(H)
      • Refutation
        • S(f);XQ(J)
    • Try
      • P(B);CHECK
      • Vars
        • P(a);EP,XP(B)::S(A),XP(a)
      • Refutation
        • K(c);N_SPINB(e),S_FLIGHT
    • Try
      • P(C);
      • Vars
        • S(f);CHECK,OGATE,XP(G)::QAR2(J),XS(f)
        • K(c);N_SPINB(e),S_FLIGHT::B(H)
        • S(f);OGATE,XP(I)::QAB(J)
        • P(a);N_GUARD::S(A)
        • S(f);OGATE::QAB(J)
      • Refutation
        • P(b);XP(C)
  • Actual
    • P(G);
    • Vars
      • S(f);CHECK,N_GUARD::QAR2(J),XS(f)
      • K(c);N_SPINB(e),S_FLIGHT,XP(I)::B(H)
      • P(a);::S(A)
      • S(f);N_GUARD::QAR2(J)
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