MESON Chess Problem Database

Problem Display
PID: 142310 (1n6/2K1p3/b2P2Qp/2N1k1N1/2pr2pB/4pp1P/8/6n1 w - - 0 1)

Kubbel, Arvid Ivanovich

Narodni osvobozeni, 1930

(First published on Sun Jul 27 1930)

1n6/2K1p3/b2P2Qp/2N1k1N1/2pr2pB/4pp1P/8/6n1

#2

7 + 11

14868 Pirnie Collection 2011

SOLUTION

  • SOUND
  • Sets
    • 1...hxg5
      • 2.Qxg5#
  • Tries
    • 1.Sd7+?
      • 1...Kf4
        • 2.Se6#
        • 2.Qf7#
      • 1...Kd5
        • 2.Qe6#
      • 1...Sxd7!
    • 1.Sf7+?
      • 1...Kf4
        • 2.Se6#
        • 2.Qxg4#
      • 1...Kd5!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Sge6#
      • 1...Kf4
        • 2.Sge6#
      • 1...Kd5
        • 2.Sge6#
      • 1...Kf5
        • 2.Sge6#
      • 1...Kf6
        • 2.Sge6#
      • 1...Sxh3
        • 2.Sxh3#
      • 1...hxg5
        • 2.Qxg5#
      • 1...Rf4
        • 2.Sxf3#
      • 1...e6
        • 2.Sgxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • P(i);OGATE,XS(D)::QAR2(F),XP(i)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(g);P-FLIGHT::QAB1(F)
      • Refutation
        • S(k);XS(C)
    • Try
      • S(D);CHECK
      • Refutation
        • K(g);P-FLIGHT
  • Actual
    • Q(F);
    • Threat
      • QAR(F)+S(D)
    • Vars
      • K(g);S_FLIGHT::S(D)
      • K(g);P-FLIGHT::QAR(F)+S(D)
      • K(g);S_FLIGHT::B(B)+S(D)
      • S(a);XP(A)::QAR(F)+S(D),XS(a)
      • P(i);OGATE,P_SPINP(i),XS(D)::QAR2(F),XP(i)
      • R(e);SBLOCK::QAR(F)+S(D),DCHECK,XP(c)
      • P(j);::QAR(F)+S(D),XP(j)
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