MESON Chess Problem Database

Problem Display
PID: 232828 (8/3K2b1/3p3r/p3k2P/r2R4/2p5/1P2P1B1/3Q4 w - - 0 1)

Koller, Paul

Freie Presse, 1973

8/3K2b1/3p3r/p3k2P/r2R4/2p5/1P2P1B1/3Q4

#2

7 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qd2?
      • threat
        • 2.Qf4#
      • 1...Kf5
        • 2.Qf4#
      • 1...Kf6
        • 2.Qf4#
      • 1...Rxd4
        • 2.Qg5#
      • 1...Rf6
        • 2.Rd5#
      • 1...cxd2!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Qf4#
      • 1...Kxd4
        • 2.Qxc3#
      • 1...Kf5
        • 2.Qf4#
      • 1...Kf6
        • 2.Qf4#
      • 1...Rxd4
        • 2.Qg5#
      • 1...Rf6
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(d);P-FLIGHT::QAR1(A)
        • K(d);S_FLIGHT::QAR2(A)
        • R(b);SBLOCK,XR(E)::QAR2(A)
        • R(f);SBLOCK::R1(E)
      • Refutation
        • P(a);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XR(E)::QAB1(A),XP(a)
      • K(d);P-FLIGHT::QAR1(A)
      • K(d);S_FLIGHT::QAR2(A)
      • R(b);SBLOCK,XR(E)::QAR2(A)
      • R(f);SBLOCK::R1(E)
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