MESON Chess Problem Database

Problem Display
PID: 263253 (8/7K/3Ppk2/5N2/2B5/5R2/Q7/8 w - - 0 1)

Agarkov, Anatoly Yakovlevich

Szachy, 1985

8/7K/3Ppk2/5N2/2B5/5R2/Q7/8

#2

6 + 2

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kf7
      • 2.Sg7#
  • Tries
    • 1.Qd2?
      • 1...Ke5
        • 2.Qd4#
      • 1...Kf7
        • 2.Sg7#
      • 1...e5
        • 2.Sg3#
        • 2.Sd4#
        • 2.Sh4#
        • 2.Sh6#
        • 2.Se7#
        • 2.Sg7#
        • 2.Qh6#
      • 1...exf5!
    • 1.Qg2?
      • threat
        • 2.Qg7#
      • 1...Kf7
        • 2.Sg7#
      • 1...Ke5!
    • 1.Qh2?
      • 1...Kg5
        • 2.Qh4#
      • 1...Kf7
        • 2.Sg7#
      • 1...e5
        • 2.Qh4#
        • 2.Qh6#
      • 1...exf5!
    • 1.Qa5?
      • threat
        • 2.Se3#
        • 2.Sg3#
        • 2.Sd4#
        • 2.Sh4#
        • 2.Sh6#
        • 2.Se7#
        • 2.Sg7#
      • 1...Kf7
        • 2.Sg7#
      • 1...exf5
        • 2.Rxf5#
        • 2.Qxf5#
      • 1...e5
        • 2.Qd8#
      • 1...Kg5!
    • 1.Qa7?
      • threat
        • 2.Qg7#
      • 1...Ke5
        • 2.Qd4#
      • 1...Kg5!
  • Keys
    • 1.Qf2!
      • 1...Ke5
        • 2.Qd4#
      • 1...Kg5
        • 2.Qh4#
      • 1...Kf7
        • 2.Sg7#
      • 1...exf5
        • 2.Rxf5#
      • 1...e5
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(b);N_GUARD,P-FLIGHT,P_SPINP(a)::R(B)+S(D)
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(b);N_GUARD,S_CUTP(a),S_FLIGHT::QAB1(A)
        • K(b);N_GUARD,P-FLIGHT,P_SPINP(a)::R(B)+S(D)
      • Refutation
        • P(a);P_SPINP(a),XS(D)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(b);N_GUARD,P-FLIGHT,P_SPINP(a)::R(B)+S(D)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB1(A)
        • K(b);N_GUARD,P-FLIGHT,P_SPINP(a)::R(B)+S(D)
      • Refutation
        • P(a);P_SPINP(a),XS(D)
    • Try
      • Q(A);
      • Threat
        • DUALS(7)
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a)::R(B)+S(D)
        • P(a);SBLOCK::QAB(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(b);N_GUARD,S_CUTP(a),S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);N_GUARD,S_CUTP(a),S_FLIGHT::QAB1(A)
      • K(b);N_GUARD,S_FLIGHT::QAB1(A)
      • K(b);N_GUARD,P-FLIGHT,P_SPINP(a)::R(B)+S(D)
      • P(a);OGATE,P_SPINP(a),XS(D)::R1(B),XP(a)
      • P(a);SBLOCK::QAB(A)
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