MESON Chess Problem Database

Problem Display
PID: 235724 (2N1r3/B1P1Pb2/P7/3kpP2/KpN4q/2Qp1p2/B1p1r3/8 w - - 0 1)

Pituk, Alexander

2/3 Prize, Radio Ujsag, 1941

2N1r3/B1P1Pb2/P7/3kpP2/KpN4q/2Qp1p2/B1p1r3/8

#2

10 + 10

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qxe5#
    • 1...Kc6
      • 2.Sxe5#
    • 1...Qxc4
      • 2.Qxc4#
    • 1...Qe4
      • 2.Se3#
      • 2.S4b6#
    • 1...Re4
      • 2.Se3#
      • 2.S4b6#
    • 1...e4
      • 2.Se3#
      • 2.S4b6#
  • Tries
    • 1.Sd2+?
      • 1...Qc4
        • 2.Qxc4#
      • 1...b3+!
    • 1.S4d6+?
      • 1...Qc4
        • 2.Qxc4#
      • 1...b3+!
    • 1.Qxe5+?
      • 1...Kc6
        • 2.Qd6#
      • 1...Rxe5!
    • 1.Qxd3+?
      • 1...Kc6
        • 2.Qd6#
      • 1...Qd4!
  • Keys
    • 1.Qxb4!
      • threat
        • 2.Qb7#
      • 1...Ke4
        • 2.S4d6#
      • 1...Kc6
        • 2.Qd6#
      • 1...Qxc4
        • 2.Qxc4#
      • 1...Qf6
        • 2.Sa5#
      • 1...Qh6
        • 2.Sa5#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(g);S_FLIGHT::QAR1(B),XP(h)
    • K(g);S_FLIGHT::QAR(B)+S(D),DCHECK,XP(h)
    • Q(f);OGATE,P_SPINQ(f),XS(D)::QAB1(B),XQ(f)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • Q(f);N_GUARD,P_SPINQ(f)::QAB1(B),XQ(f)
      • Refutation
        • P(e);CHECK,P_SPINP(e)
    • Try
      • S(D);CHECK
      • Vars
        • Q(f);N_GUARD,P_SPINQ(f)::QAB1(B),XQ(f)
      • Refutation
        • P(e);CHECK,P_SPINP(e)
    • Try
      • Q(B);CHECK,XP(h)
      • Vars
        • K(g);S_FLIGHT::QAR1(B)
      • Refutation
        • R(b);XQ(B)
    • Try
      • Q(B);CHECK,XP(c)
      • Vars
        • K(g);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • Q(f);P_SPINQ(f)
  • Actual
    • Q(B);XP(e)
    • Threat
      • QAB(B)
    • Vars
      • K(g);S_FLIGHT::QAR(B)+S(D),DCHECK
      • K(g);S_FLIGHT::QAR1(B)
      • Q(f);OGATE,P_PINQ(B),P_SPINQ(f),XS(D)::QAB1(B),XQ(f)
      • Q(f);N_GUARD::B(A)+S(D)
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