MESON Chess Problem Database

Problem Display
PID: 16981 (Q5b1/1KP5/1pR1pp2/p5br/4k2r/1N2N1P1/2R1P1p1/1B2B1q1 w - - 0 1)

Mansfield, Comins

American Chess Bulletin, 1945

Q5b1/1KP5/1pR1pp2/p5br/4k2r/1N2N1P1/2R1P1p1/1B2B1q1

#2

11 + 11

3550 Complete Mansfield/II 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe3
      • 2.R2c5#
    • 1...Bh7
      • 2.Rxe6#
    • 1...e5
      • 2.R2c3#
  • Tries
    • 1.Ka6?
      • threat
        • 2.Rxe6#
      • 1...Kxe3
        • 2.R6c3#
      • 1...Qxe3
        • 2.R6c5#
      • 1...Bxe3
        • 2.R2c5#
      • 1...e5
        • 2.R2c3#
      • 1...Ke5!
    • 1.Ka7?
      • threat
        • 2.Rxe6#
      • 1...Kxe3
        • 2.R6c3#
      • 1...Qxe3
        • 2.R6c5#
      • 1...Bxe3
        • 2.R2c5#
      • 1...e5
        • 2.R2c3#
      • 1...Ke5!
    • 1.Kb8?
      • threat
        • 2.Rxe6#
      • 1...Kxe3
        • 2.R6c3#
      • 1...Qxe3
        • 2.R6c5#
      • 1...Bxe3
        • 2.R2c5#
      • 1...e5
        • 2.R2c3#
      • 1...Ke5!
    • 1.Kc8?
      • threat
        • 2.Rxe6#
      • 1...Kxe3
        • 2.R6c3#
      • 1...Qxe3
        • 2.R6c5#
      • 1...Bxe3
        • 2.R2c5#
      • 1...e5
        • 2.R2c3#
      • 1...Ke5!
    • 1.Ra2+?
      • 1...Kxe3
        • 2.Rc3#
      • 1...Ke5!
    • 1.Rb2+?
      • 1...Kxe3
        • 2.Rc3#
      • 1...Ke5!
    • 1.Rd2+?
      • 1...Kxe3
        • 2.Rc3#
      • 1...Ke5!
  • Keys
    • 1.Kxb6!
      • threat
        • 2.Rxe6#
      • 1...Qxe3+
        • 2.R6c5#
      • 1...Bxe3+
        • 2.R2c5#
      • 1...Kxe3
        • 2.R6c3#
      • 1...Ke5
        • 2.R2c5#
      • 1...e5
        • 2.R2c3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(f);SBLOCK,XS(F)::B(A)+R(C)
    • B(k);N_GUARD::R(H),XP(i)
    • P(i);SBLOCK::B(A)+R(C)
  • Tries
    • Try
      • K(I);S_FLIGHT
      • Threat
        • QAB(K)+R(H),DCHECK,XP(i)
      • Vars
        • K(c);P-FLIGHT,XS(F)::R(H)
        • Q(a);SBLOCK,XS(F)::QAB(K)+R(H)
        • B(f);SBLOCK,XS(F)::B(A)+R(C)
        • P(i);SBLOCK::B(A)+R(C)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • K(I);P-FLIGHT
      • Threat
        • QAB(K)+R(H),DCHECK,XP(i)
      • Vars
        • K(c);P-FLIGHT,XS(F)::R(H)
        • Q(a);SBLOCK,XS(F)::QAB(K)+R(H)
        • B(f);SBLOCK,XS(F)::B(A)+R(C)
        • P(i);SBLOCK::B(A)+R(C)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • K(I);P-FLIGHT
      • Threat
        • QAB(K)+R(H),DCHECK,XP(i)
      • Vars
        • K(c);P-FLIGHT,XS(F)::R(H)
        • Q(a);SBLOCK,XS(F)::QAB(K)+R(H)
        • B(f);SBLOCK,XS(F)::B(A)+R(C)
        • P(i);SBLOCK::B(A)+R(C)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • K(I);S_FLIGHT
      • Threat
        • QAB(K)+R(H),DCHECK,XP(i)
      • Vars
        • K(c);P-FLIGHT,XS(F)::R(H)
        • Q(a);SBLOCK,XS(F)::QAB(K)+R(H)
        • B(f);SBLOCK,XS(F)::B(A)+R(C)
        • P(i);SBLOCK::B(A)+R(C)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • K(c);P-FLIGHT,XS(F)::R(H)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • K(c);P-FLIGHT,XS(F)::R(H)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • K(c);P-FLIGHT,XS(F)::R(H)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • K(I);P-FLIGHT,P_SPINS(F),XP(h)
    • Threat
      • QAB(K)+R(H),DCHECK,XP(i)
    • Vars
      • Q(a);CHECK,SBLOCK,XS(F)::QAB(K)+R(H)
      • B(f);CHECK,SBLOCK,XS(F)::B(A)+R(C)
      • K(c);P-FLIGHT,XS(F)::R(H)
      • K(c);P-FLIGHT::R(C)
      • P(i);SBLOCK::B(A)+R(C)
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