MESON Chess Problem Database

Problem Display
PID: 262533 (2B1N3/8/8/3pk3/4N3/6K1/2Q5/8 w - - 0 1)

Chernyavsky, Mykola Vasilovich

Sp. HM., SuperProblem, 2013

2B1N3/8/8/3pk3/4N3/6K1/2Q5/8

#2

5 + 2

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...dxe4
      • 2.Qc5#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Sf3#
      • 1...d4
        • 2.Qe4#
        • 2.Qf5#
        • 2.Qc5#
      • 1...Kd4!
    • 1.Sf2?
      • 1...d4
        • 2.Qe4#
        • 2.Qf5#
        • 2.Qc5#
      • 1...Kd4!
    • 1.Sc3?
      • 1...d4
        • 2.Qe4#
        • 2.Qf5#
        • 2.Qe2#
      • 1...Kd4!
    • 1.Sc5?
      • 1...d4
        • 2.Qe4#
        • 2.Qf5#
      • 1...Kd4!
    • 1.Sg5?
      • threat
        • 2.Sf3#
      • 1...d4
        • 2.Qe4#
        • 2.Qf5#
        • 2.Qc5#
      • 1...Kd4!
    • 1.S4d6?
      • 1...d4
        • 2.Qe4#
        • 2.Qf5#
        • 2.Qc5#
      • 1...Kd4!
    • 1.S4f6?
      • 1...d4
        • 2.Qe4#
        • 2.Qf5#
        • 2.Qe2#
        • 2.Qc5#
        • 2.Qc7#
      • 1...Kd4!
    • 1.S8d6?
      • 1...Kd4
        • 2.Qc3#
      • 1...d4
        • 2.Qc5#
      • 1...dxe4!
    • 1.S8f6?
      • 1...Kd4
        • 2.Qc3#
      • 1...d4
        • 2.Qc5#
        • 2.Qc7#
      • 1...dxe4!
    • 1.Bf5?
      • 1...Kd4
        • 2.Qc3#
      • 1...dxe4
        • 2.Qxe4#
        • 2.Qc5#
      • 1...d4
        • 2.Qc5#
      • 1...Kxf5!
    • 1.Qd3?
      • 1...dxe4
        • 2.Qd6#
      • 1...d4!
    • 1.Qf2?
      • 1...dxe4
        • 2.Qc5#
      • 1...d4
        • 2.Qf5#
      • 1...Kxe4!
    • 1.Qc3+?
      • 1...Kxe4
        • 2.Sd6#
        • 2.Sf6#
      • 1...d4!
    • 1.Qc4?
      • 1...dxe4
        • 2.Qc5#
      • 1...d4
        • 2.Qe6#
      • 1...dxc4!
  • Keys
    • 1.Kf3!
      • 1...dxe4+
        • 2.Qxe4#
      • 1...Kd4
        • 2.Qc3#
      • 1...d4
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB,SBLOCK,XS(C)::QAR2(A)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(C);
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(C);
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(C);
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(C);
      • Threat
        • S(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(C);
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(C);
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(E);
      • Vars
        • K(b);S_CUTP(a),S_FLIGHT::QAB1(A)
        • P(a);OGATEB::QAR2(A)
      • Refutation
        • P(a);XS(C)
    • Try
      • S(E);
      • Vars
        • K(b);S_CUTP(a),S_FLIGHT::QAB1(A)
      • Refutation
        • P(a);XS(C)
    • Try
      • B(D);
      • Vars
        • K(b);N_GUARD,S_CUTP(a),S_FLIGHT::QAB1(A)
        • P(a);OGATEB::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT,XB(D)
    • Try
      • Q(A);
      • Vars
        • P(a);OGATE,SBLOCK,XS(C)::QAB1(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • P(a);OGATEB,SBLOCK,XS(C)::QAR2(A)
        • P(a);SBLOCK::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT,XS(C)
    • Try
      • Q(A);CHECK
      • Refutation
        • P(a);P_SPINP(a)
    • Try
      • Q(A);
      • Vars
        • P(a);OGATEB,SBLOCK,XS(C)::QAR2(A)
        • P(a);OGATE,SBLOCK::QAR1(A)
      • Refutation
        • P(a);XQ(A)
  • Actual
    • K(B);P-FLIGHT
    • Vars
      • P(a);CHECK,OGATE,XS(C)::QAR1(A),XP(a)
      • K(b);S_CUTP(a),S_FLIGHT::QAB1(A)
      • P(a);OGATEB::QAR2(A)
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