MESON Chess Problem Database

Problem Display
PID: 223370 (2N5/8/K7/3kp3/2RP2B1/8/Q7/8 w - - 0 1)

Anonymous

The Chess Player's Chronicle (Staunton), 1885

2N5/8/K7/3kp3/2RP2B1/8/Q7/8

#2

6 + 2

5454 Near Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sb6+?
      • 1...Kd6
        • 2.Qa3#
      • 1...Ke4!
    • 1.Se7+?
      • 1...Kd6
        • 2.Qa3#
      • 1...Ke4!
    • 1.Rc3+?
      • 1...Kxd4
        • 2.Qc4#
      • 1...Ke4!
    • 1.Ra4+?
      • 1...Kc6
        • 2.Qc4#
      • 1...Ke4!
    • 1.Rb4+?
      • 1...Kc6
        • 2.Qc4#
      • 1...Ke4!
    • 1.Qb3?
      • 1...Ke4
        • 2.Qf3#
      • 1...e4
        • 2.Qb5#
      • 1...exd4!
    • 1.Qc2?
      • 1...exd4
        • 2.Rc5#
      • 1...e4!
    • 1.Qe2?
      • 1...exd4
        • 2.Bf3#
        • 2.Be6#
        • 2.Qe6#
      • 1...e4!
    • 1.Qf2?
      • 1...Ke4
        • 2.Qf3#
      • 1...exd4
        • 2.Qxd4#
      • 1...e4
        • 2.Rc5#
        • 2.Qf7#
      • 1...Kxc4!
  • Keys
    • 1.Qd2!
      • 1...Kxc4
        • 2.Be6#
      • 1...Ke4
        • 2.d5#
      • 1...exd4
        • 2.Qxd4#
      • 1...e4
        • 2.Rc5#

This anticipates 46964(1958), 140171(1975)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(a);P-FLIGHT,XP(C)::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • P(b);SBLOCK::QAR2(A)
      • Refutation
        • P(b);XP(C)
    • Try
      • Q(A);
      • Vars
        • P(b);SBLOCK,XP(C)::R1(B)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • P(b);OGATE,XP(C)::QAR1(A),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT,XR(B)::B(D)
      • K(a);OGATE,S_FLIGHT::R(B)+P(C)
      • P(b);OGATE,P_SPINP(b),XP(C)::QAR1(A),XP(b)
      • P(b);SBLOCK::R1(B)
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