MESON Chess Problem Database

Problem Display
PID: 102966 (Kn1n1q2/4Q3/B1P5/k7/NR1P4/b4p2/8/8 w - - 0 1)

Kofman, Rafael Moiseevich

Revista de Sah, 1927

Kn1n1q2/4Q3/B1P5/k7/NR1P4/b4p2/8/8

#2

7 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxa6
      • 2.Qa7#
  • Tries
    • 1.Qc5+?
      • 1...Kxa6
        • 2.Rb6#
        • 2.Qb6#
        • 2.Qa7#
        • 2.Qb5#
      • 1...Qxc5!
    • 1.Qe5+?
      • 1...Kxb4
        • 2.Qb5#
      • 1...Kxa6
        • 2.Rb6#
        • 2.Qb5#
      • 1...Qc5!
    • 1.Qc7+?
      • 1...Kxa6
        • 2.Qb6#
        • 2.Qa7#
      • 1...Kxb4!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Rb5#
      • 1...Kxb4
        • 2.Qe1#
      • 1...Bxb4
        • 2.Qc7#
      • 1...Sxa6
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(c);OGATEB,P-FLIGHT,XB(D)::QAR1(F)
  • Tries
    • Try
      • Q(F);CHECK
      • Refutation
        • Q(f);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(c);S_FLIGHT,XR(B)::QAR1(F)
      • Refutation
        • Q(f);P_SPINQ(f)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(c);S_FLIGHT,XR(B)
  • Actual
    • S(A);
    • Threat
      • R1(B)
    • Vars
      • K(c);OGATEB,S_FLIGHT,XR(B)::QAB(F)
      • B(a);SBLOCK,XR(B)::QAB(F)
      • S(d);SBLOCK,XB(D)::S(A)
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