MESON Chess Problem Database

Problem Display
PID: 96596 (8/8/8/K7/b1p5/kPQ5/N7/8 w - - 0 1)

Myhre, Gunnar Frode

Problemas, 1973

8/8/8/K7/b1p5/kPQ5/N7/8

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sc1?
      • threat
        • 2.Qa1#
        • 2.bxa4#
      • 1...cxb3
        • 2.Qa1#
      • 1...Bb5
        • 2.Qa1#
        • 2.bxc4#
        • 2.b4#
      • 1...Bc6
        • 2.Qa1#
        • 2.bxc4#
        • 2.b4#
      • 1...Bd7
        • 2.Qa1#
        • 2.bxc4#
        • 2.b4#
      • 1...Be8
        • 2.Qa1#
        • 2.bxc4#
        • 2.b4#
      • 1...Bxb3!
  • Keys
    • 1.Sb4!
      • threat
        • 2.bxa4#
      • 1...Bxb3
        • 2.Qc1#
      • 1...cxb3
        • 2.Qa1#
      • 1...Bb5
        • 2.bxc4#
      • 1...Bc6
        • 2.bxc4#
      • 1...Bd7
        • 2.bxc4#
      • 1...Be8
        • 2.bxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);P_SPINP(c),XP(B)::QAR2(C)
      • Refutation
        • B(b);P_SPINB(b),XP(B)
  • Actual
    • S(A);
    • Threat
      • QAR(C)+P(B),XB(b)
    • Vars
      • B(b);P_SPINB(b),SBLOCK,XP(B)::QAB(C)
      • P(c);P_SPINP(c),SBLOCK,XP(B)::QAR2(C)
      • B(b);N_GUARD::QAR(C)+P(B),XP(c)
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