MESON Chess Problem Database

Problem Display
PID: 133657 (8/4p3/1K6/3k1NR1/8/1n6/4Q3/8 w - - 0 1)

Zhezherun, Bogdan Valeriovich

Smena, 2001

8/4p3/1K6/3k1NR1/8/1n6/4Q3/8

#2

4 + 3

145 StrateGems 2003
145 StrateGems 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sd6+?
      • 1...Kd4
        • 2.Sb5#
      • 1...e5
        • 2.Qxe5#
      • 1...Kxd6!
    • 1.Sxe7+?
      • 1...Kd6
        • 2.Rd5#
      • 1...Kd4!
    • 1.Rg6?
      • threat
        • 2.Qe6#
      • 1...Sd4
        • 2.Sxe7#
      • 1...e5
        • 2.Rd6#
      • 1...e6
        • 2.Qxe6#
      • 1...Sc5!
  • Keys
    • 1.Rg4!
      • threat
        • 2.Qe4#
      • 1...e5
        • 2.Qc4#
      • 1...Sd2
        • 2.Rd4#
      • 1...Sd4
        • 2.Rxd4#
      • 1...Sc5
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(b);P-FLIGHT::S(B)
        • P(c);P_SPINP(c)::QAR1(A),XP(c)
      • Refutation
        • K(b);P-FLIGHT,XS(B)
    • Try
      • S(B);CHECK,XP(c)
      • Vars
        • K(b);P-FLIGHT::R1(C)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(C);
      • Threat
        • QAB1(A)
      • Vars
        • S(a);SBLOCK::S(B),XP(c)
        • P(c);N_GUARD::R1(C)
        • P(c);::QAB1(A),XP(c)
      • Refutation
        • S(a);
  • Actual
    • R(C);
    • Threat
      • QAB1(A)
    • Vars
      • P(c);SBLOCK::QAB1(A)
      • S(a);N_GUARD::R1(C)
      • S(a);N_GUARD::R1(C),XS(a)
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