MESON Chess Problem Database

Problem Display
PID: 227823 (8/5K2/1P6/4k3/1N1p2p1/3Q2P1/8/8 w - - 0 1)

Goldschmidt, Ervin

Magyar Sakkvilag, 1926

8/5K2/1P6/4k3/1N1p2p1/3Q2P1/8/8

#2

5 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qxd4#
  • Tries
    • 1.Qf1?
      • threat
        • 2.Qf4#
      • 1...Ke4
        • 2.Qf4#
      • 1...Kd6!
    • 1.Qc2?
      • 1...Kd6
        • 2.Qc7#
      • 1...d3!
    • 1.Qe2+?
      • 1...Kd6
        • 2.Qe7#
      • 1...Kf5!
    • 1.Qc4?
      • threat
        • 2.Qd5#
        • 2.Qe6#
      • 1...Kf5
        • 2.Qd5#
      • 1...Kd6
        • 2.Qd5#
        • 2.Qxd4#
        • 2.Qc7#
      • 1...d3
        • 2.Qd5#
        • 2.Qf4#
      • 1...Ke4!
    • 1.Qe4+?
      • 1...Kd6
        • 2.Qd5#
        • 2.Qxd4#
        • 2.Qe7#
      • 1...Kxe4!
    • 1.Qb5+?
      • 1...Kd6
        • 2.Qd5#
      • 1...Ke4!
    • 1.Qf5+?
      • 1...Kd6
        • 2.Qd5#
      • 1...Kxf5!
    • 1.Qb3?
      • threat
        • 2.Qd5#
        • 2.Qe6#
      • 1...Kf5
        • 2.Qd5#
      • 1...Kd6
        • 2.Qd5#
      • 1...d3
        • 2.Qd5#
      • 1...Ke4!
    • 1.Qe3+?
      • 1...Kf5
        • 2.Qf4#
      • 1...Kd6
        • 2.Qxd4#
        • 2.Qe7#
      • 1...dxe3!
    • 1.Qf3?
      • threat
        • 2.Qd5#
        • 2.Qf4#
      • 1...Kd6
        • 2.Qd5#
      • 1...gxf3!
    • 1.Qxd4+?
      • 1...Kf5
        • 2.Qf4#
        • 2.Qd5#
      • 1...Kxd4!
  • Keys
    • 1.Qd2!
      • threat
        • 2.Qf4#
      • 1...Ke4
        • 2.Qf4#
      • 1...Kf5
        • 2.Qf4#
      • 1...Kd6
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);P_SPINP(a),S_FLIGHT::QAR2(A),XP(a)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(c);P-FLIGHT::QAR1(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(c);S_FLIGHT::QAB1(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(a)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(c);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR1(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(c);P-FLIGHT,XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
        • K(c);S_FLIGHT::QAR1(A)
        • P(a);::QAR1(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(A)
      • Refutation
        • P(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);S_FLIGHT::QAR1(A)
      • Refutation
        • P(b);XQ(A)
    • Try
      • Q(A);CHECK,XP(a)
      • Refutation
        • K(c);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(c);P-FLIGHT::QAR1(A)
      • K(c);P_SPINP(a),S_FLIGHT::QAR2(A),XP(a)
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