MESON Chess Problem Database

Problem Display
PID: 245081 (7Q/8/4p3/8/1p6/1p6/PP6/k1K5 w - - 0 1)

Fomichev, Evgeny Vasilevich

Scacchi e Scienze Applicate, 2006

7Q/8/4p3/8/1p6/1p6/PP6/k1K5

#2

4 + 4

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxa2
      • 2.Qa8#
  • Tries
    • 1.Qd4?
      • 1...Kxa2
        • 2.Qa7#
      • 1...bxa2
        • 2.b3#
      • 1...e5!
    • 1.Qh1?
      • 1...Kxa2
        • 2.Qa8#
      • 1...bxa2
        • 2.Kc2#
      • 1...e5!
    • 1.Qh7?
      • threat
        • 2.Qb1#
      • 1...Kxa2
        • 2.Qb1#
        • 2.Qa7#
      • 1...bxa2!
  • Keys
    • 1.Qe5!
      • 1...Kxa2
        • 2.Qa5#
      • 1...bxa2
        • 2.b3#

Anticipated by 981(1995)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,P-FLIGHT,XP(B)::QAR(D)
  • Tries
    • Try
      • Q(D);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(B)::QAR(D)
        • P(b);OGATE,SBLOCK,XP(B)::QAB(D)+P(C)
      • Refutation
        • P(d);
    • Try
      • Q(D);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(B)::QAR(D)
        • P(b);SBLOCK,XP(B)::QAR(D)+K(A)
      • Refutation
        • P(d);
    • Try
      • Q(D);
      • Threat
        • QAR1(D)
      • Refutation
        • P(b);XP(B)
  • Actual
    • Q(D);
    • Vars
      • K(a);OGATEB,P-FLIGHT,XP(B)::QAR(D)
      • P(b);OGATE,SBLOCK,XP(B)::QAB(D)+P(C)
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