MESON Chess Problem Database

Problem Display
PID: 229327 (7k/5Kp1/1Q6/8/8/5p1r/8/8 w - - 0 1)

Matthaus, Hans Georg

Comm., Deutsche Schachzeitung, 1972

7k/5Kp1/1Q6/8/8/5p1r/8/8

#2

2 + 4

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rh7
      • 2.Qd8#
      • 2.Qb8#
  • Tries
    • 1.Qb2?
      • threat
        • 2.Qxg7#
      • 1...Kh7
        • 2.Qxg7#
      • 1...Rh7
        • 2.Qb8#
      • 1...Rg3!
    • 1.Qf6?
      • threat
        • 2.Qxg7#
      • 1...Kh7
        • 2.Qxg7#
      • 1...Rg3
        • 2.Qh4#
      • 1...Rh7
        • 2.Qd8#
      • 1...gxf6!
    • 1.Qg6?
      • threat
        • 2.Qxg7#
      • 1...Rg3
        • 2.Qh5#
      • 1...Rh7!
  • Keys
    • 1.Qd4!
      • threat
        • 2.Qxg7#
      • 1...Kh7
        • 2.Qxg7#
      • 1...Rg3
        • 2.Qh4#
      • 1...Rh7
        • 2.Qd8#

Anticipated by 138170(1965)

This anticipates 184335(1979-1980)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);P_PINP(c)
      • Threat
        • QAB1(A),XP(c)
      • Vars
        • K(d);N_SPINP(c),P-FLIGHT::QAR1(A),XP(c)
        • R(b);SBLOCK::QAR(A)
      • Refutation
        • R(b);
    • Try
      • Q(A);P_PINP(c)
      • Threat
        • QAB1(A),XP(c)
      • Vars
        • K(d);N_SPINP(c),P-FLIGHT::QAR1(A),XP(c)
        • R(b);N_GUARD::QAR(A)
        • R(b);SBLOCK::QAR(A)
      • Refutation
        • P(c);N_SPINP(c),XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(c)
      • Vars
        • R(b);N_GUARD::QAR(A)
      • Refutation
        • R(b);
  • Actual
    • Q(A);P_PINP(c)
    • Threat
      • QAB1(A),XP(c)
    • Vars
      • K(d);N_SPINP(c),P-FLIGHT::QAR1(A),XP(c)
      • R(b);N_GUARD::QAR(A)
      • R(b);SBLOCK::QAR(A)
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