MESON Chess Problem Database

Problem Display
PID: 229221 (1r3k1r/R2p1P2/2p2KB1/Q7/1q6/B2n4/8/8 w - - 0 1)

Funk, Jacob E

Pittsburgh Sun, 1926

1r3k1r/R2p1P2/2p2KB1/Q7/1q6/B2n4/8/8

#2

6 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6+
      • 2.Bxd6#
    • 1...Qe7+
      • 2.Bxe7#
    • 1...Rb5
      • 2.Qd8#
    • 1...Rb7
      • 2.Qd8#
    • 1...Ra8
      • 2.Rxa8#
    • 1...Rd8
      • 2.Qxd8#
    • 1...Re8
      • 2.fxe8Q#
      • 2.fxe8R#
  • Tries
    • 1.Qxb4+?
      • 1...Rxb4
        • 2.Ra8#
      • 1...Sc5
        • 2.Qxb8#
      • 1...c5
        • 2.Qxb8#
      • 1...d6
        • 2.Qxd6#
        • 2.Qxb8#
      • 1...Sxb4!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qxb8#
      • 1...Qd6+
        • 2.Bxd6#
        • 2.Qxd6#
      • 1...Qe7+
        • 2.Bxe7#
      • 1...Sc5
        • 2.Qd6#
      • 1...Rb5
        • 2.Qd8#
        • 2.Qc8#
      • 1...Rb6
        • 2.Qd8#
        • 2.Qc8#
      • 1...Rb7
        • 2.Qd8#
        • 2.Qc8#
      • 1...Ra8
        • 2.Rxa8#
      • 1...Rc8
        • 2.Qxc8#
      • 1...Rd8
        • 2.Qxd8#
      • 1...Re8
        • 2.fxe8Q#
        • 2.fxe8R#
      • 1...c5
        • 2.Qd6#
      • 1...d6
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • Q(b);CHECK,OGATE::B(A),XQ(b)
    • R(e);N_GUARD::QAR2(B)
    • R(e);OGATEB::R(E),XR(e)
    • R(e);N_GUARD::QAR2(B),XR(e)
    • R(e);OGATE::PXR(e)=Q
  • Tries
    • Try
      • Q(B);CHECK,XQ(b)
      • Vars
        • R(e);P_SPINR(e),S_CUTP(c),S_CUTP(d),S_CUTS(a),S_CUTS(a),XQ(B)::R(E)
        • S(a);P_SPINS(a)::QAR(B),XR(e)
        • P(c);P_SPINP(c)::QAR(B),XR(e)
      • Refutation
        • S(a);P_SPINS(a),XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAR(B),XR(e)
    • Vars
      • Q(b);CHECK,OGATE::B(A),XQ(b)
      • S(a);N_SPINQ(b),S_CUTQ(b)::QAB(B)
      • R(e);OGATEB::R(E),XR(e)
      • R(e);N_GUARD::QAR(B),XR(e)
      • R(e);N_GUARD::QAR2(B),XR(e)
      • R(e);OGATE::PXR(e)=Q
      • P(c);N_SPINQ(b),S_CUTQ(b)::QAB(B)
      • P(d);N_SPINQ(b),OGATE::QAB1(B)
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