MESON Chess Problem Database

Problem Display
PID: 179468 (4Qn2/8/6pp/R5qk/3P3P/5K2/5b1R/7n w - - 0 1)

Davidenko, Fedor Vasilevich

2nd HM., Moscow Ty., 2002

4Qn2/8/6pp/R5qk/3P3P/5K2/5b1R/7n

#2

6 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qb5
      • 2.Rxb5#
    • 1...Qc5
      • 2.Rxc5#
    • 1...Qd5+
      • 2.Rxd5#
    • 1...Qe5
      • 2.Rxe5#
    • 1...Qf5+
      • 2.Rxf5#
    • 1...Be3
      • 2.hxg5#
    • 1...Bxd4
      • 2.hxg5#
    • 1...Sg3
      • 2.hxg5#
  • Keys
    • 1.Qe2!
      • threat
        • 2.Ke4#
      • 1...Qd5+
        • 2.Kf4#
      • 1...Qf5+
        • 2.Kg2#
      • 1...Qe5
        • 2.Kg2#
      • 1...Sg3
        • 2.hxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • Q(c);OGATEB::R(E),XQ(c)
    • Q(c);CHECK,OGATEB::R(E),XQ(c)
    • B(b);N_GUARD::R(A)+P(D),XQ(c)
    • B(b);N_GUARD,XP(C)::R(A)+P(D),XQ(c)
    • S(a);S_CUTB(b)::R(A)+P(D),XQ(c)
  • Actual
    • Q(F);N_PINP(e)
    • Threat
      • QAB(F)+K(B)
    • Vars
      • Q(c);CHECK::QAB(F)+K(B)
      • Q(c);::QAB(F)+K(B)
      • S(a);S_CUTB(b)::R(A)+P(D),XQ(c)
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