MESON Chess Problem Database

Problem Display
PID: 106185 (8/1Q6/8/2k1p3/3RPB2/1rp2K2/2p5/8 w - - 0 1)

Kovacik, Jozef

Praca, 1954

8/1Q6/8/2k1p3/3RPB2/1rp2K2/2p5/8

#2

5 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qd5#
    • 1...Rb6
      • 2.Qd5#
  • Tries
    • 1.Rc4+?
      • 1...Kd6
        • 2.Rc6#
      • 1...Kxc4!
    • 1.Qc6+?
      • 1...Kxd4
        • 2.Qd5#
      • 1...Kxc6!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Rc4#
      • 1...Kxd4
        • 2.Be3#
      • 1...exd4
        • 2.Bd6#
      • 1...Rb6
        • 2.Qc4#
      • 1...Rb4
        • 2.Rd5#
      • 1...Rb5
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(d);S_FLIGHT,XR(B)::QAR1(E)
    • R(b);SBLOCK::QAR1(E)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(d);OGATE,P_SPINP(e),S_FLIGHT::R1(B)
      • Refutation
        • K(d);P-FLIGHT,XR(B)
    • Try
      • Q(E);CHECK
      • Vars
        • K(d);S_FLIGHT,XR(B)::QAR1(E)
      • Refutation
        • K(d);P-FLIGHT,XQ(E)
  • Actual
    • Q(E);
    • Threat
      • R1(B)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XR(B)::B(D)
      • P(e);OGATE,SBLOCK,XR(B)::B(D)
      • R(b);SBLOCK::QAR1(E)
      • R(b);SBLOCK::R1(B)
      • R(b);SBLOCK::QAB1(E)
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