MESON Chess Problem Database

Problem Display
PID: 219121 (8/6K1/4p3/5k2/4p3/7R/Q2B4/8 w - - 0 1)

Trautner, Dr Rolf

Deutsche Schachzeitung, 1966

8/6K1/4p3/5k2/4p3/7R/Q2B4/8

#2

4 + 3

15148 Sadier Collection 2020
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kg4
      • 2.Qxe6#
  • Tries
    • 1.Qd5+?
      • 1...Kg4
        • 2.Qxe6#
        • 2.Qh5#
      • 1...e5
        • 2.Qd7#
      • 1...exd5!
    • 1.Qc2?
      • 1...Ke5
        • 2.Qc5#
      • 1...e5
        • 2.Qc8#
      • 1...Kg4!
    • 1.Qa5+?
      • 1...Kg4
        • 2.Qh5#
      • 1...e5!
  • Keys
    • 1.Qc4!
      • 1...Kg4
        • 2.Qxe6#
      • 1...Ke5
        • 2.Qc5#
      • 1...e3
        • 2.Rh5#
      • 1...e5
        • 2.Qc8#

This anticipates 23754(1996)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAB(A),XP(c)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • P(c);OGATEB,P_SPINP(c),SBLOCK::QAB(A)
      • Refutation
        • P(c);XQ(A)
    • Try
      • Q(A);P_PINP(a)
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT::QAR2(A)
        • P(c);OGATEB,SBLOCK::QAB(A)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • P(c);P_SPINP(c)
  • Actual
    • Q(A);
    • Vars
      • K(b);P_SPINP(a),S_FLIGHT::QAB(A),XP(c)
      • K(b);P-FLIGHT::QAR2(A)
      • P(a);::R(C)
      • P(c);OGATEB,SBLOCK::QAB(A)
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