MESON Chess Problem Database

Problem Display
PID: 27644 (B7/3p3R/2n5/2Nkn2R/KB1p4/8/2PQ2N1/8 w - - 0 1)

Dombrovskis, Alfreds A

Schakend Nederland, 1961

B7/3p3R/2n5/2Nkn2R/KB1p4/8/2PQ2N1/8

#2

9 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Qxd3#
    • 1...d6
      • 2.Se3#
  • Tries
    • 1.Kb3?
      • threat
        • 2.Rxd7#
      • 1...d6
        • 2.Se3#
        • 2.Sf4#
        • 2.c4#
      • 1...Kd6!
    • 1.Kb5?
      • threat
        • 2.Rxd7#
      • 1...d6
        • 2.Se3#
        • 2.Sf4#
        • 2.Bxc6#
        • 2.c4#
      • 1...Kd6!
    • 1.R7h6?
      • threat
        • 2.Se3#
      • 1...d3
        • 2.Qxd3#
      • 1...Kc4!
    • 1.Qe2?
      • threat
        • 2.Rxd7#
      • 1...d3
        • 2.Qxd3#
      • 1...d6
        • 2.Sf4#
      • 1...Kd6!
    • 1.Qd3?
      • threat
        • 2.Rxd7#
      • 1...d6
        • 2.Se3#
        • 2.Sf4#
        • 2.Qb3#
        • 2.c4#
      • 1...Kd6!
    • 1.c3?
      • threat
        • 2.Qxd4#
      • 1...Kc4
        • 2.Qa2#
      • 1...d3
        • 2.Qxd3#
      • 1...Kd6!
    • 1.c4+?
      • 1...Kxc4
        • 2.Qa2#
      • 1...Kd6!
  • Keys
    • 1.Qf4!
      • 1...Kc4
        • 2.Se3#
      • 1...Kd6
        • 2.Rxd7#
      • 1...d3
        • 2.Rxd7#
      • 1...d6
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB::QAR2(B),XP(a)
    • P(e);SBLOCK::S(C)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • R(H),XP(e)
      • Refutation
        • K(b);N_SPINS(c),P-FLIGHT
    • Try
      • K(D);S_FLIGHT
      • Threat
        • R(H),XP(e)
      • Refutation
        • K(b);N_SPINS(c),P-FLIGHT
    • Try
      • R(H);
      • Threat
        • S(C)
      • Vars
        • P(a);OGATEB::QAR2(B),XP(a)
      • Refutation
        • K(b);N_SPINP(a),N_SPINS(c),S_FLIGHT
    • Try
      • Q(B);N_PINP(a)
      • Threat
        • R(H),XP(e)
      • Vars
        • P(a);OGATEB::QAR2(B),XP(a)
        • P(e);SBLOCK::S(C)
      • Refutation
        • K(b);N_SPINS(c),P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • R(H),XP(e)
      • Refutation
        • K(b);N_SPINS(c),P-FLIGHT
    • Try
      • P(A);
      • Threat
        • QAR1(B),XP(a)
      • Vars
        • K(b);N_SPINP(a),N_SPINS(c),S_FLIGHT::QAB(B)
        • P(a);OGATEB::QAR2(B),XP(a)
      • Refutation
        • K(b);N_SPINS(c),P-FLIGHT
    • Try
      • P(A);CHECK
      • Vars
        • K(b);N_SPINP(a),N_SPINS(c),S_FLIGHT,XP(A)::QAB(B)
      • Refutation
        • K(b);N_SPINS(c),P-FLIGHT
  • Actual
    • Q(B);N_PINP(a)
    • Vars
      • K(b);N_SPINS(c),P_SPINP(a),S_FLIGHT::S(C)
      • K(b);P-FLIGHT::R1(H),XP(e)
      • P(a);::R(H),XP(e)
      • P(e);SBLOCK::QAB(B)
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