MESON Chess Problem Database

Problem Display
PID: 244503 (8/p7/K1p5/B2p4/2kp4/1Np2p2/2Q2P2/8 w - - 0 1)

Fomichev, Evgeny Vasilevich

L'Italia Scacchistica, 2008

8/p7/K1p5/B2p4/2kp4/1Np2p2/2Q2P2/8

#2

5 + 7

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Qxc3#
    • 1...c5
      • 2.Sd2#
  • Tries
    • 1.Sc1?
      • 1...d3
        • 2.Qxc3#
      • 1...c5
        • 2.Qb3#
        • 2.Qd3#
        • 2.Qa4#
        • 2.Qa2#
      • 1...Kc5!
    • 1.Sc5?
      • 1...d3
        • 2.Qxc3#
      • 1...Kxc5!
  • Keys
    • 1.Qa2!
      • 1...Kd3
        • 2.Sc5#
      • 1...d3
        • 2.Qa4#
      • 1...c2
        • 2.Qxc2#
      • 1...c5
        • 2.Sc1#

Anticipated by 110724(1957)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(d);N_GUARD::QAR1(A),XP(a)
    • P(f);SBLOCK::S(C)
  • Tries
    • Try
      • S(C);
      • Vars
        • P(d);N_GUARD::QAR1(A),XP(a)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(C);
      • Vars
        • P(d);N_GUARD::QAR1(A),XP(a)
      • Refutation
        • K(c);P-FLIGHT,XS(C)
  • Actual
    • Q(A);N_PINP(a)
    • Vars
      • K(c);S_FLIGHT::S(C)
      • P(d);SBLOCK::QAR2(A)
      • P(a);OGATEB::QAR2(A),XP(a)
      • P(f);SBLOCK::QAB(A)+S(C)
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