MESON Chess Problem Database

Problem Display
PID: 224211 (7Q/2K5/8/2R5/nkB5/R7/1p6/2n5 w - - 0 1)

Mazel, Eduard

Bahn Frei, 1888

7Q/2K5/8/2R5/nkB5/R7/1p6/2n5

#2

5 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc5
      • 2.Qc3#
  • Tries
    • 1.Rxa4+?
      • 1...Kxc5
        • 2.Qe5#
      • 1...Kxa4!
  • Keys
    • 1.Ra5!
      • threat
        • 2.R3xa4#
      • 1...Kxa3
        • 2.Qf8#
      • 1...Kxc4
        • 2.Qh4#
      • 1...Kxa5
        • 2.Qc3#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sc5
        • 2.Qc3#
      • 1...Sb6
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD,SBLOCK,XR(C)::QAB1(E)
  • Tries
    • Try
      • R(A);CHECK,XS(c)
      • Vars
        • K(d);S_FLIGHT,XR(C)::QAR2(E)
      • Refutation
        • K(d);P-FLIGHT,XR(A)
  • Actual
    • R(C);
    • Threat
      • R1(A),XS(c)
    • Vars
      • K(d);P_SPINS(c),S_FLIGHT,XR(A)::QAB(E)
      • K(d);OGATEB,P-FLIGHT,XB(B)::QAR(E)
      • K(d);P_SPINS(c),S_FLIGHT,XR(C)::QAB(E)
      • S(c);N_GUARD::QAB1(E),XS(c)
      • S(c);N_GUARD::QAB1(E)
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