MESON Chess Problem Database

Problem Display
PID: 197757 (Q5b1/8/8/1p1Rn1B1/3n4/3pNkPB/K5R1/8 w - - 0 1)

Braithwaite, Kenneth Holmes

The Problemist, 1981

Q5b1/8/8/1p1Rn1B1/3n4/3pNkPB/K5R1/8

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd5+
      • 2.Qxd5#
    • 1...Se6
      • 2.Rxe5#
    • 1...Sc4
      • 2.Rf5#
    • 1...Sf7
      • 2.Rxd4#
      • 2.Rf5#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Sd2#
      • 1...Ke4
        • 2.Sd2#
        • 2.Rxe5#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...Sxc4
        • 2.Rf5#
      • 1...Sb3
        • 2.Rxd3#
      • 1...d2
        • 2.Sxd2#
      • 1...bxc4!
  • Keys
    • 1.Sf1!
      • threat
        • 2.Sd2#
      • 1...Bxd5+
        • 2.Qxd5#
      • 1...Ke4
        • 2.Sd2#
      • 1...Sb3
        • 2.Rxd3#
      • 1...Sc4
        • 2.Rf5#
      • 1...d2
        • 2.Sxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(f);CHECK,OGATE,P_SPINB(f),XR(F)::QAB(H),XB(f)
    • S(c);N_PINR(F)::QAB(H)+R(F),XS(e)
    • S(e);N_PINR(F)::QAB(H)+R(F),DCHECK
  • Tries
    • Try
      • S(C);N_SPINR(F)
      • Threat
        • S(C)
      • Vars
        • B(f);OGATE,P_PINS(C),P_SPINB(f),XR(F)::QAB(H),XB(f)
        • S(e);OGATE,XS(C)::QAB(H)+R(F),DCHECK
        • S(c);OGATE::QAB(H)+R(F),DCHECK,XP(a)
        • P(a);::S(C),XP(a)
      • Refutation
        • P(d);XS(C)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • B(f);CHECK,OGATE,P_SPINB(f),XR(F)::QAB(H),XB(f)
      • K(b);S_FLIGHT::S(C)
      • S(c);N_PINR(F)::QAB(H)+R(F),DCHECK,XP(a)
      • S(e);N_PINR(F)::QAB(H)+R(F),DCHECK
      • P(a);::S(C),XP(a)
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