MESON Chess Problem Database

Problem Display
PID: 239946 (Q7/8/8/1p1KP1p1/2r3p1/4Bkp1/6N1/5B2 w - - 0 1)

Hermanson, Halvar

Parallele 50, 1951

Q7/8/8/1p1KP1p1/2r3p1/4Bkp1/6N1/5B2

#2

6 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Qf8#
    • 1...Rc2
      • 2.Qf8#
    • 1...Rc3
      • 2.Qf8#
    • 1...Rd4+
      • 2.Kxd4#
    • 1...Rc5+
      • 2.Kxc5#
    • 1...b4
      • 2.Kxc4#
  • Tries
    • 1.Kd6+?
      • 1...Rc6+
        • 2.Qxc6#
      • 1...Re4!
    • 1.Ke6+?
      • 1...Rc6+
        • 2.Qxc6#
      • 1...Re4!
  • Keys
    • 1.Qa3!
      • threat
        • 2.Se1#
      • 1...Rd4+
        • 2.Bxd4#
      • 1...Rc5+
        • 2.Bxc5#
      • 1...Rc1
        • 2.Qf8#
      • 1...Rc3
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • R(c);N_GUARD::QAR(F)
    • R(c);CHECK::QAB(F)+K(D),XR(c)
    • P(e);::QAB(F)+K(D),XR(c)
  • Tries
    • Try
      • K(D);CHECK,P-FLIGHT
      • Vars
        • R(c);CHECK,N_GUARD,P_SPINR(c)::QAB(F),XR(c)
      • Refutation
        • R(c);P_SPINR(c)
    • Try
      • K(D);CHECK,S_FLIGHT
      • Vars
        • R(c);CHECK,N_GUARD,P_SPINR(c)::QAB(F),XR(c)
      • Refutation
        • R(c);P_PINP(E),P_SPINR(c)
  • Actual
    • Q(F);
    • Threat
      • S(B)
    • Vars
      • R(c);CHECK,N_GUARD::QAR(F)+B(C),XR(c)
      • R(c);N_GUARD::QAR(F)
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