MESON Chess Problem Database

Problem Display
PID: 17213 (8/8/8/8/2p2p1Q/2K2B2/5p2/4k3 w - - 0 1)

Palkoska, Emil

L'Echiquier Marseillais, 1925-1926

8/8/8/8/2p2p1Q/2K2B2/5p2/4k3

#2

3 + 4

273 Mat Plus 1995
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kf1
      • 2.Qh1#
  • Tries
    • 1.Kc2?
      • 1...Kf1
        • 2.Qh1#
      • 1...c3!
    • 1.Kxc4?
      • 1...Kf1
        • 2.Qh1#
      • 1...Kd2!
    • 1.Bg4?
      • 1...Kf1
        • 2.Qh1#
      • 1...f3!
    • 1.Bh5?
      • 1...Kf1
        • 2.Qh1#
      • 1...f3!
    • 1.Qd8?
      • threat
        • 2.Qd1#
      • 1...Kf1
        • 2.Qd1#
      • 1...f1Q
        • 2.Qd2#
      • 1...f1B
        • 2.Qh4#
        • 2.Qd2#
      • 1...f1R
        • 2.Qd2#
      • 1...f1S!
    • 1.Qxf4?
      • threat
        • 2.Qc1#
      • 1...Kf1
        • 2.Qc1#
      • 1...f1Q
        • 2.Qd2#
      • 1...f1B
        • 2.Qd2#
        • 2.Qg3#
        • 2.Qh4#
      • 1...f1R
        • 2.Qd2#
        • 2.Qe3#
      • 1...f1S!
  • Keys
    • 1.Qh2!
      • 1...Kf1
        • 2.Qh1#
      • 1...f1Q
        • 2.Qd2#
      • 1...f1S
        • 2.Qe2#
      • 1...f1B
        • 2.Qd2#
        • 2.Qh4#
      • 1...f1R
        • 2.Qd2#
        • 2.Qe2#

This anticipates 220395(1928)

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINP(b),P-FLIGHT::QAR2(C)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR2(C)
      • Refutation
        • P(c);
    • Try
      • K(A);P-FLIGHT,XP(c)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR2(C)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • B(B);
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR2(C)
      • Refutation
        • P(d);
    • Try
      • B(B);
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR2(C)
      • Refutation
        • P(d);
    • Try
      • Q(C);N_PINP(b)
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
        • P(b);SBLOCK::QAB1(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);N_PINP(b),XP(d)
      • Threat
        • QAR2(C)
      • Vars
        • K(a);P-FLIGHT::QAR(C)
        • P(b);SBLOCK::QAB1(C)
      • Refutation
        • P(b);
  • Actual
    • Q(C);N_PINP(b)
    • Vars
      • K(a);P-FLIGHT::QAR2(C)
      • P(b);OGATE,SBLOCK::QAB1(C)
      • P(b);OGATE::QAR1(C)
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