MESON Chess Problem Database

Problem Display
PID: 97944 (6R1/5B2/4r3/3N1kBR/Q4b2/6n1/K2N2nr/8 w - - 0 1)

Hermanson, Halvar

Problem 025. TT, 1959

6R1/5B2/4r3/3N1kBR/Q4b2/6n1/K2N2nr/8

#2

8 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kg4
      • 2.Bf6#
    • 1...Ke5
      • 2.Bxf4#
    • 1...Bxg5
      • 2.Rhxg5#
      • 2.Rgxg5#
    • 1...Se1
      • 2.Qxf4#
    • 1...Se3
      • 2.Qxf4#
    • 1...Sh4
      • 2.Qxf4#
  • Tries
    • 1.Bxf4+?
      • 1...Sxh5
        • 2.Rg5#
      • 1...Rxh5!
    • 1.Bh4+?
      • 1...Bg5
        • 2.Rhxg5#
        • 2.Rgxg5#
      • 1...Sxh5!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qxe6#
      • 1...Kg4
        • 2.Bxf4#
      • 1...Ke5
        • 2.Bf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • K(e);P_SPINB(d),S_FLIGHT::R(H)+B(E)
    • K(e);P-FLIGHT::R(F)+B(E),DCHECK,XB(d)
    • S(a);N_GUARD,P_PINS(B)::QAR1(C),XB(d)
  • Tries
    • Try
      • B(E);CHECK,XB(d)
      • Vars
        • S(c);XR(F)::R1(H)
      • Refutation
        • R(b);XR(F)
    • Try
      • B(E);CHECK
      • Refutation
        • S(c);XR(F)
  • Actual
    • Q(C);P_PINR(f)
    • Threat
      • QAB1(C),XR(f)
    • Vars
      • K(e);S_FLIGHT::R(H)+B(E),XB(d)
      • K(e);N_SPINR(f),P-FLIGHT::R(F)+B(E),DCHECK
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