MESON Chess Problem Database

Problem Display
PID: 233244 (8/2p5/Q7/1RNp1K2/2Pk4/8/3B1n2/2r5 w - - 0 1)

Muller, Dieter

Freie Presse, 1969

8/2p5/Q7/1RNp1K2/2Pk4/8/3B1n2/2r5

#2

6 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc4
      • 2.Qa4#
    • 1...Rxc4
      • 2.Qf6#
  • Tries
    • 1.Sb3+?
      • 1...Kxc4
        • 2.Rb4#
        • 2.Rb6#
        • 2.Rb7#
        • 2.Rb8#
      • 1...Kd3!
    • 1.Se6+?
      • 1...Kxc4
        • 2.Rb1#
        • 2.Rb2#
        • 2.Rb4#
        • 2.Rb6#
        • 2.Rb7#
        • 2.Rb8#
      • 1...Kd3!
    • 1.Qa1+?
      • 1...Kxc4
        • 2.Qa4#
      • 1...Rc3
        • 2.Qxc3#
      • 1...Rxa1!
    • 1.Qa8?
      • threat
        • 2.Qxd5#
      • 1...Kxc4
        • 2.Qa4#
      • 1...Rxc4
        • 2.Qh8#
      • 1...dxc4
        • 2.Qd8#
      • 1...c6!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qxd5#
      • 1...Kxc4
        • 2.Rb4#
      • 1...Rxc4
        • 2.Qf6#
      • 1...dxc4
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);OGATEB,P-FLIGHT,XP(B)::QAR2(F)
    • R(a);SBLOCK,XP(B)::QAB(F)
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(D);CHECK
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(c);OGATEB,P-FLIGHT,XP(B)::QAR2(F)
        • R(a);N_GUARD,P_SPINR(a)::QAB1(F),XR(a)
      • Refutation
        • R(a);XQ(F)
    • Try
      • Q(F);
      • Threat
        • QAR1(F),XP(d)
      • Vars
        • K(c);OGATEB,P-FLIGHT,XP(B)::QAR2(F)
        • R(a);SBLOCK,XP(B)::QAB(F)
        • P(d);OGATEB,SBLOCK,XP(B)::QAR(F)
      • Refutation
        • P(e);
  • Actual
    • Q(F);
    • Threat
      • QAR1(F),XP(d)
    • Vars
      • K(c);OGATEB,P-FLIGHT,XP(B)::R1(C)
      • R(a);SBLOCK,XP(B)::QAB(F)
      • P(d);OGATEB,SBLOCK,XP(B)::QAR(F)
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