MESON Chess Problem Database

Problem Display
PID: 102936 (8/3N4/8/p2p4/4k3/5R2/3p4/Kb1Q4 w - - 0 1)

Zimmermann, Stepan

Otavan, 1908

8/3N4/8/p2p4/4k3/5R2/3p4/Kb1Q4

#2

4 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qa4#
  • Tries
    • 1.Qb3?
      • threat
        • 2.Qe3#
      • 1...Kd4
        • 2.Qa4#
      • 1...Bd3
        • 2.Qxd3#
      • 1...d4
        • 2.Qb7#
      • 1...d1S!
    • 1.Qa4+?
      • 1...d4
        • 2.Qc6#
      • 1...Kxf3!
    • 1.Qxb1+?
      • 1...Kd4
        • 2.Qd3#
      • 1...Kxf3!
  • Keys
    • 1.Rg3!
      • threat
        • 2.Qg4#
      • 1...Kd4
        • 2.Qa4#
      • 1...Kf4
        • 2.Qf3#
        • 2.Qg4#
      • 1...Kf5
        • 2.Qg4#
      • 1...d4
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT,P_SPINP(b)::QAR(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • K(c);P-FLIGHT::QAR(B)
        • B(a);N_GUARD::QAB1(B),XB(a)
        • P(e);OGATEB,SBLOCK::QAB(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);CHECK
      • Vars
        • P(e);OGATEB,P_SPINP(e),SBLOCK::QAB(B)
      • Refutation
        • K(c);S_FLIGHT,XR(C)
    • Try
      • Q(B);CHECK,XB(a)
      • Vars
        • K(c);P-FLIGHT::QAR1(B)
      • Refutation
        • K(c);S_FLIGHT,XR(C)
  • Actual
    • R(C);
    • Threat
      • QAR2(B)
    • Vars
      • K(c);P-FLIGHT,P_SPINP(b)::QAR(B)
      • K(c);S_FLIGHT::QAB1(B)
      • P(e);SBLOCK::QAB1(B)
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