MESON Chess Problem Database

Problem Display
PID: 251668 (5N2/2nnp3/2r3QK/2p1p2B/4PkN1/4R2b/5Pr1/8 w - - 0 1)

Hermanson, Halvar

1st HM., Jerusalem Post, 1953

5N2/2nnp3/2r3QK/2p1p2B/4PkN1/4R2b/5Pr1/8

#2

8 + 9

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rg3
      • 2.fxg3#
    • 1...Rxg6+
      • 2.Sxg6#
    • 1...Se6
      • 2.Qf5#
    • 1...Sf6
      • 2.Qf5#
      • 2.Qg5#
    • 1...e6
      • 2.Qg5#
  • Tries
    • 1.Se6+?
      • 1...Sxe6
        • 2.Qf5#
      • 1...Rxe6!
    • 1.Qf6+?
      • 1...Sxf6
        • 2.Sg6#
      • 1...exf6
        • 2.Sg6#
      • 1...Rxf6+!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Rf3#
      • 1...Rxg6+
        • 2.Sxg6#
      • 1...Rxf2
        • 2.Qg3#
        • 2.Qg5#
      • 1...Rg3
        • 2.Qxg3#
      • 1...Rg4
        • 2.Qf5#
      • 1...Bg4
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(a);OGATE::P(A),XR(a)
    • R(f);CHECK,XQ(F)::S(H),XR(f)
    • S(g);N_PINQ(F)::QAR1(F)
    • P(i);N_PINQ(F)::QAB1(F)
  • Tries
    • Try
      • S(H);CHECK,N_SPINQ(F)
      • Vars
        • S(g);XS(H)::QAR1(F)
      • Refutation
        • R(f);P_PINQ(F),XS(H)
    • Try
      • Q(F);CHECK
      • Vars
        • S(h);XQ(F)::S(H)
        • P(i);XQ(F)::S(H)
      • Refutation
        • R(f);CHECK,XQ(F)
  • Actual
    • S(D);N_SPINQ(F)
    • Threat
      • R1(B)
    • Vars
      • R(a);CHECK,XQ(F)::S(H),XR(a)
      • R(a);N_GUARD::QAB1(F),XR(a)
      • R(a);S_CUTB(b)::QAR1(F)
      • B(b);S_CUTR(a)::QAB1(F)
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