MESON Chess Problem Database

Problem Display
PID: 238154 (4R3/1B2N1KQ/8/2BPnPp1/1P2k3/3r1rP1/4P3/4N3 w - - 0 1)

Hermanson, Halvar

Deutsche Schachzeitung, 1966

4R3/1B2N1KQ/8/2BPnPp1/1P2k3/3r1rP1/4P3/4N3

#2

12 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5
      • 2.Bxd5#
    • 1...Rxf5
      • 2.Qxf5#
  • Tries
    • 1.Sc6?
      • threat
        • 2.Rxe5#
      • 1...Kxd5
        • 2.Sxe5#
      • 1...Rxd5
        • 2.exf3#
      • 1...Rxg3!
    • 1.d6+?
      • 1...Rd5
        • 2.Bxd5#
      • 1...Sc6!
    • 1.f6+?
      • 1...Rf5
        • 2.Qxf5#
      • 1...Sg6!
  • Keys
    • 1.Sg6!
      • threat
        • 2.Rxe5#
      • 1...Kxf5
        • 2.Sxe5#
      • 1...Rxf5
        • 2.exd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(a);OGATE,P_SPINR(a),XP(F)::B(H),XR(a)
    • R(b);OGATE,P_SPINR(b),XP(G)::QAB1(K),XR(b)
  • Tries
    • Try
      • S(I);P_PINS(d)
      • Threat
        • R1(L),XS(d)
      • Vars
        • K(c);N_SPINS(d),S_FLIGHT,XP(F)::B(H)+S(I),XS(d)
        • R(a);N_GUARD,SBLOCK,XP(F)::P(B),XR(b)
      • Refutation
        • R(b);XP(C)
    • Try
      • P(F);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::B(H),XR(a)
      • Refutation
        • S(d);P_SPINS(d)
    • Try
      • P(G);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAB1(K),XR(b)
      • Refutation
        • S(d);P_SPINS(d)
  • Actual
    • S(I);P_PINS(d)
    • Threat
      • R1(L),XS(d)
    • Vars
      • K(c);N_SPINS(d),S_FLIGHT,XP(G)::QAB(K)+S(I),XS(d)
      • R(b);N_GUARD,SBLOCK,XP(G)::P(B),XR(a)
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