MESON Chess Problem Database

Problem Display
PID: 238191 (8/1N2R3/kp3Q2/N7/8/1K6/8/8 w - - 0 1)

Murashev, Pavel Aleksandrovich

ChessStar, 2010

8/1N2R3/kp3Q2/N7/8/1K6/8/8

#2

5 + 2

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kb5
      • 2.Qf1#
  • Tries
    • 1.Ka3?
      • 1...Kb5
        • 2.Qf1#
      • 1...Ka7!
    • 1.Sc4?
      • threat
        • 2.Qxb6#
      • 1...Kb5
        • 2.Qxb6#
      • 1...Ka7!
    • 1.Sd6?
      • 1...Kxa5
        • 2.Ra7#
        • 2.Qa1#
      • 1...b5
        • 2.Sdc4#
      • 1...bxa5!
    • 1.Re1?
      • 1...Kb5
        • 2.Qf1#
      • 1...Ka7!
    • 1.Re3?
      • 1...Kb5
        • 2.Qf1#
      • 1...Ka7!
    • 1.Re4?
      • 1...Kb5
        • 2.Qf1#
      • 1...Ka7!
    • 1.Re6?
      • 1...Kb5
        • 2.Rxb6#
        • 2.Qf1#
      • 1...Ka7!
    • 1.Rc7?
      • 1...Kb5
        • 2.Qf1#
      • 1...Ka7!
    • 1.Rd7?
      • 1...Kb5
        • 2.Qf1#
      • 1...Ka7!
    • 1.Rf7?
      • 1...Kb5
        • 2.Qf1#
      • 1...Ka7!
    • 1.Rg7?
      • 1...Kb5
        • 2.Qf1#
      • 1...Ka7!
    • 1.Rh7?
      • 1...Kb5
        • 2.Qf1#
      • 1...Ka7!
    • 1.Re8?
      • 1...Kb5
        • 2.Qf1#
      • 1...Ka7!
    • 1.Qd6?
      • 1...Kb5
        • 2.Qd3#
      • 1...Ka7!
    • 1.Qe6?
      • 1...Kb5
        • 2.Qc4#
        • 2.Qe2#
      • 1...Ka7!
    • 1.Qg6?
      • 1...Kb5
        • 2.Qd3#
      • 1...Ka7!
  • Keys
    • 1.Qa1!
      • 1...Kb5
        • 2.Qf1#
      • 1...Ka7
        • 2.Sc6#
      • 1...bxa5
        • 2.Qxa5#
      • 1...b5
        • 2.Sc4#

Anticipated by 7625(1992)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINP(b),S_FLIGHT::QAB(C)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB(C)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • S(B);
      • Threat
        • QAR1(C),XP(b)
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAR1(C),XP(b)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • S(D);N_PINP(b)
      • Vars
        • P(b);SBLOCK::QAR(C)+S(D)
      • Refutation
        • P(b);XS(B)
    • Try
      • R(E);
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB(C)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • R(E);
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB(C)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • R(E);
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB(C)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • R(E);
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • R(E);
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB(C)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • R(E);
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB(C)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • R(E);
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB(C)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • R(E);
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB(C)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • R(E);
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB(C)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • R(E);
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB(C)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB(C)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • Q(C);
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB(C)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
  • Actual
    • Q(C);N_PINP(b)
    • Vars
      • K(a);S_FLIGHT::QAB(C)
      • K(a);P-FLIGHT::QAR(C)+S(B),DCHECK
      • P(b);OGATE,P_SPINP(b),XS(B)::QAR1(C),XP(b)
      • P(b);SBLOCK::QAR(C)+S(B)
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