MESON Chess Problem Database

Problem Display
PID: 198808 (8/8/4p3/2p3Q1/3k4/N4P2/3K4/8 w - - 0 1)

Rudd, Charles Dember

Chess Amateur (The), 1921

8/8/4p3/2p3Q1/3k4/N4P2/3K4/8

#2

4 + 3

6490 yacpdb 2019
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...c4
      • 2.Sc2#
      • 2.Sb5#
    • 1...e5
      • 2.Qd8#
  • Tries
    • 1.Ke2?
      • 1...e5
        • 2.Qd2#
      • 1...c4
        • 2.Sb5#
      • 1...Kc3!
    • 1.Qf6+?
      • 1...e5
        • 2.Qd8#
        • 2.Qd6#
      • 1...Kd5!
    • 1.Qf5?
      • threat
        • 2.Qe4#
      • 1...c4
        • 2.Sc2#
        • 2.Sb5#
      • 1...exf5!
    • 1.Qh5?
      • 1...c4
        • 2.Sc2#
        • 2.Sb5#
      • 1...e5!
    • 1.Qg7+?
      • 1...e5
        • 2.Qd7#
      • 1...Kd5!
    • 1.f4?
      • threat
        • 2.Qe5#
      • 1...e5
        • 2.Qxe5#
      • 1...Ke4!
  • Keys
    • 1.Kc2!
      • 1...e5
        • 2.Qd2#
      • 1...c4
        • 2.Sb5#

This anticipates 23048(1996)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAR(D)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(c);SBLOCK::QAR2(D)
        • P(b);SBLOCK::S(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);
      • Threat
        • QAR1(D)
      • Refutation
        • P(c);XQ(D)
    • Try
      • Q(D);
      • Refutation
        • P(c);
    • Try
      • Q(D);CHECK
      • Vars
        • P(c);P_SPINP(c),SBLOCK::QAR(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(C);
      • Threat
        • QAB1(D)
      • Vars
        • P(c);::QAB1(D),XP(c)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • K(A);P-FLIGHT
    • Vars
      • P(c);SBLOCK::QAR2(D)
      • P(b);SBLOCK::S(B)
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Developed and maintained by Brian Stephenson.
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