MESON Chess Problem Database

Problem Display
PID: 4773 (8/8/Q3P3/3pk2K/1P2pR2/8/3P2N1/8 w - - 0 1)

Montvid, ES

Chess Monthly, 1892

8/8/Q3P3/3pk2K/1P2pR2/8/3P2N1/8

#2

7 + 3

3360 Simple Two-move Themes 1924
3310 2345 Chess Problems 1997
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...e3
      • 2.d4#
  • Tries
    • 1.Kg4?
      • 1...e3
        • 2.d4#
      • 1...d4
        • 2.Rf5#
      • 1...Kd4!
    • 1.Kg5?
      • 1...e3
        • 2.d4#
      • 1...d4
        • 2.Rf5#
      • 1...Kd4!
    • 1.Kg6?
      • 1...e3
        • 2.d4#
      • 1...d4
        • 2.Rf5#
      • 1...Kd4!
    • 1.Qb6?
      • 1...e3
        • 2.d4#
      • 1...d4!
    • 1.Qc6?
      • 1...Kd4
        • 2.Qc3#
      • 1...e3
        • 2.d4#
      • 1...d4!
  • Keys
    • 1.Sh4!
      • 1...Kd4
        • 2.Sf3#
      • 1...Kxf4
        • 2.Qd6#
      • 1...d4
        • 2.Rf5#
      • 1...e3
        • 2.Sg6#

This anticipates 164663(1901)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(a);N_GUARD::P(A)
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Vars
        • P(a);N_GUARD::P(A)
        • P(b);SBLOCK::R1(D)
      • Refutation
        • K(c);P_SPINP(a),S_FLIGHT
    • Try
      • K(E);P-FLIGHT
      • Vars
        • P(a);N_GUARD::P(A)
        • P(b);SBLOCK::R1(D)
      • Refutation
        • K(c);P_SPINP(a),S_FLIGHT
    • Try
      • K(E);S_FLIGHT
      • Vars
        • P(a);N_GUARD::P(A)
        • P(b);SBLOCK::R1(D)
      • Refutation
        • K(c);P_SPINP(a),S_FLIGHT
    • Try
      • Q(F);
      • Vars
        • P(a);N_GUARD::P(A)
      • Refutation
        • P(b);
    • Try
      • Q(F);
      • Vars
        • K(c);P_SPINP(a),S_FLIGHT::QAB1(F)
        • P(a);N_GUARD::P(A)
      • Refutation
        • P(b);
  • Actual
    • S(B);
    • Vars
      • K(c);P_SPINP(a),S_FLIGHT::S(B)
      • K(c);S_FLIGHT,XR(D)::QAB(F)
      • P(b);SBLOCK::R1(D)
      • P(a);::S(B)
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