MESON Chess Problem Database

Problem Display
PID: 157155 (4B2B/8/2p3pR/2pkp3/6Q1/K7/4P3/8 w - - 0 1)

Hermanson, Halvar

Schackvarlden, 1926

4B2B/8/2p3pR/2pkp3/6Q1/K7/4P3/8

#2

6 + 5

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qd7#
    • 1...g5
      • 2.Bxc6#
      • 2.Bf7#
  • Tries
    • 1.Kb3?
      • 1...Kd6
        • 2.Qd7#
      • 1...e4
        • 2.Qd7#
      • 1...g5
        • 2.Bxc6#
        • 2.Bf7#
        • 2.Qc4#
      • 1...c4+!
    • 1.Bxc6+?
      • 1...Kd6
        • 2.Qd7#
      • 1...Kxc6!
    • 1.Rxg6?
      • threat
        • 2.Bxc6#
        • 2.Bf7#
      • 1...e4
        • 2.Bf7#
        • 2.Qe6#
      • 1...c4!
    • 1.Qf5?
      • 1...Kc4
        • 2.Qd3#
      • 1...Kd4
        • 2.Qd3#
      • 1...Kd6
        • 2.Qd7#
        • 2.Qxe5#
      • 1...c4
        • 2.Qxe5#
      • 1...g5
        • 2.Qd3#
      • 1...gxf5!
    • 1.Qd7+?
      • 1...Kc4
        • 2.Qd3#
      • 1...Ke4!
    • 1.Qe4+?
      • 1...Kd6
        • 2.Qxe5#
      • 1...Ke6
        • 2.Qxe5#
      • 1...Kxe4!
    • 1.Qf4?
      • 1...Kd6
        • 2.Qxe5#
      • 1...Ke6
        • 2.Qxe5#
      • 1...c4
        • 2.Qxe5#
      • 1...e4
        • 2.Bf7#
      • 1...g5
        • 2.Bxc6#
        • 2.Bf7#
      • 1...exf4!
    • 1.Qxg6?
      • threat
        • 2.Qd3#
      • 1...Kc4
        • 2.Qd3#
      • 1...Kd4
        • 2.Qd3#
      • 1...e4
        • 2.Bf7#
        • 2.Qf7#
        • 2.Qe6#
        • 2.Qg8#
      • 1...c4!
  • Keys
    • 1.Qg3!
      • 1...Kc4
        • 2.Qd3#
      • 1...Kd4
        • 2.Qd3#
      • 1...Ke4
        • 2.Qxe5#
      • 1...Kd6
        • 2.Qxe5#
      • 1...Ke6
        • 2.Qxe5#
      • 1...c4
        • 2.Qxe5#
      • 1...e4
        • 2.Bf7#
      • 1...g5
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,P_SPINP(e)::QAR1(C)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(b);P-FLIGHT,P_SPINP(e)::QAR1(C)
        • P(c);SBLOCK::QAR2(C)
      • Refutation
        • P(a);CHECK
    • Try
      • B(E);CHECK,XP(d)
      • Vars
        • K(b);P-FLIGHT,P_SPINP(e)::QAR1(C)
      • Refutation
        • K(b);P_SPINP(e),S_FLIGHT,XB(E)
    • Try
      • R(D);XP(e)
      • Threat
        • DUALS(2)
      • Refutation
        • P(a);
    • Try
      • Q(C);P_PINP(c)
      • Vars
        • K(b);N_SPINP(c),S_FLIGHT::QAB1(C)
        • K(b);P-FLIGHT::QAR1(C)
        • P(a);SBLOCK::QAR1(C),XP(c)
        • P(e);::QAR2(C)
      • Refutation
        • P(e);N_SPINP(c),XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINP(e)::QAB1(C),XP(c)
        • K(b);P_SPINP(c),S_FLIGHT::QAR1(C),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XQ(C)
    • Try
      • Q(C);
      • Vars
        • K(b);P-FLIGHT,P_SPINP(c)::QAB1(C),XP(c)
        • K(b);P_SPINP(e),S_FLIGHT::QAR1(C),XP(c)
        • P(a);SBLOCK::QAR1(C),XP(c)
        • P(c);::B(E)
      • Refutation
        • P(c);XQ(C)
    • Try
      • Q(C);XP(e)
      • Threat
        • QAR2(C)
      • Vars
        • K(b);S_FLIGHT::QAB1(C)
        • K(b);P-FLIGHT,P_SPINP(c)::QAR1(C)
      • Refutation
        • P(a);
  • Actual
    • Q(C);
    • Vars
      • K(b);S_FLIGHT::QAB1(C)
      • K(b);P-FLIGHT,P_SPINP(c)::QAR1(C)
      • K(b);S_FLIGHT::QAR1(C),XP(c)
      • K(b);P-FLIGHT,P_SPINP(c)::QAB1(C),XP(c)
      • K(b);P_SPINP(e),S_FLIGHT::QAR1(C),XP(c)
      • P(a);SBLOCK::QAR1(C),XP(c)
      • P(c);SBLOCK::B(E)
      • P(e);::QAR2(C)
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