MESON Chess Problem Database

Problem Display
PID: 263015 (8/8/5K2/4pN2/7Q/3N1k2/B7/8 w - - 0 1)

Zhezherun, Bogdan Valeriovich

Schweizerische Schachzeitung, 2009

8/8/5K2/4pN2/7Q/3N1k2/B7/8

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Sc1?
      • 1...e4
        • 2.Qg3#
      • 1...Kg2!
    • 1.Sf4?
      • 1...Ke4
        • 2.Bd5#
      • 1...e4
        • 2.Qg3#
      • 1...exf4!
    • 1.Bd5+?
      • 1...e4
        • 2.Qxe4#
      • 1...Ke2!
    • 1.Qf2+?
      • 1...Ke4
        • 2.Sc5#
        • 2.Qe3#
        • 2.Qe2#
      • 1...Kg4!
    • 1.Qg3+?
      • 1...Ke4
        • 2.Sf2#
        • 2.Sc5#
        • 2.Qe3#
      • 1...Ke2!
    • 1.Qg5?
      • 1...Ke4
        • 2.Qe3#
      • 1...e4
        • 2.Sd4#
      • 1...Ke2!
    • 1.Qh3+?
      • 1...Ke4
        • 2.Qe3#
      • 1...Ke2!
    • 1.Qh5+?
      • 1...Ke4
        • 2.Qe2#
      • 1...Kg2!
  • Keys
    • 1.Qh2!
      • 1...Ke4
        • 2.Qe2#
      • 1...Kg4
        • 2.Sxe5#
      • 1...e4
        • 2.Se5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Vars
        • P(b);SBLOCK::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);
      • Vars
        • K(a);S_CUTP(b),S_FLIGHT::B(A)
        • P(b);SBLOCK::QAR1(C)
      • Refutation
        • P(b);XS(B)
    • Try
      • B(A);CHECK
      • Vars
        • P(b);P_SPINP(b)::QAB1(C),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR1(C)
        • P(b);N_GUARD,SBLOCK::S(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAR2(C)
      • K(a);N_GUARD,S_FLIGHT::S(B),XP(b)
      • P(b);SBLOCK::S(B)
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