MESON Chess Problem Database

Problem Display
PID: 229333 (8/5p2/1K2B3/8/bk6/8/8/3N3Q w - - 0 1)

Myhre, Gunnar Frode

Deutsche Schachzeitung, 1976

8/5p2/1K2B3/8/bk6/8/8/3N3Q

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qd5?
      • threat
        • 2.Qc5#
        • 2.Qd6#
      • 1...Ka3
        • 2.Qc5#
        • 2.Qd6#
      • 1...Bxd1
        • 2.Qa5#
      • 1...Bc2
        • 2.Qa5#
      • 1...Bb3
        • 2.Qxb3#
        • 2.Qa5#
      • 1...Bb5
        • 2.Qb3#
      • 1...Bc6
        • 2.Qb3#
        • 2.Qa5#
      • 1...Bd7
        • 2.Qb3#
        • 2.Qa5#
      • 1...Be8
        • 2.Qb3#
        • 2.Qa5#
      • 1...fxe6!
    • 1.Qa8?
      • threat
        • 2.Qf8#
      • 1...Ka3
        • 2.Qf8#
      • 1...Bxd1
        • 2.Qa5#
      • 1...Bc2
        • 2.Qa5#
      • 1...Bb3
        • 2.Qa5#
      • 1...Bb5
        • 2.Qa5#
      • 1...Bc6
        • 2.Qa5#
      • 1...Bd7
        • 2.Qa5#
      • 1...Be8
        • 2.Qa5#
      • 1...fxe6!
  • Keys
    • 1.Qh4+!
      • 1...Ka3
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);XS(A)::QAB1(B)
        • B(a);::QAB1(B)
        • B(a);N_GUARD::QAR1(B)
      • Refutation
        • P(c);XB(D)
    • Try
      • Q(B);
      • Threat
        • QAB(B)
      • Vars
        • K(b);P_SPINB(a),S_FLIGHT::QAB(B)
        • B(a);XS(A)::QAB1(B)
        • B(a);::QAB1(B)
      • Refutation
        • P(c);XB(D)
  • Actual
    • Q(B);CHECK
    • Vars
      • K(b);S_FLIGHT::QAB(B)
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