MESON Chess Problem Database

Problem Display
PID: 230399 (6Q1/5Bpr/7k/7p/5K2/8/8/8 w - - 0 1)

Matthaus, Hans Georg

Deutsche Schachzeitung, 1988

6Q1/5Bpr/7k/7p/5K2/8/8/8

#2

3 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rh8
      • 2.Qxh8#
    • 1...g5+
      • 2.Qxg5#
    • 1...g6
      • 2.Qxg6#
  • Tries
    • 1.Kf5?
      • 1...g6+
        • 2.Qxg6#
      • 1...Rh8
        • 2.Qxh8#
      • 1...g5
        • 2.Qxg5#
        • 2.Qg6#
      • 1...h4!
    • 1.Bg6?
      • threat
        • 2.Qxh7#
      • 1...Kxg6
        • 2.Qe6#
      • 1...Rh8!
    • 1.Be8?
      • 1...g5+
        • 2.Qxg5#
      • 1...Rh8
        • 2.Qxh8#
      • 1...g6
        • 2.Qxg6#
      • 1...h4!
    • 1.Qd8?
      • threat
        • 2.Qg5#
      • 1...g5+
        • 2.Qxg5#
      • 1...Rh8
        • 2.Qxh8#
      • 1...g6!
    • 1.Qf8?
      • 1...Rh8
        • 2.Qxh8#
      • 1...h4!
  • Keys
    • 1.Bxh5!
      • 1...g5+
        • 2.Qxg5#
      • 1...Kxh5
        • 2.Qxh7#
      • 1...Rh8
        • 2.Qxh8#
      • 1...g6
        • 2.Qxg6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(d);OGATEB::QAR2(C),XR(d)
    • P(c);CHECK,OGATE::QAB1(C),XP(c)
    • P(c);OGATE::QAR1(C),XP(c)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(c);CHECK,OGATE::QAR1(C),XP(c)
        • R(d);OGATEB::QAR2(C),XR(d)
      • Refutation
        • P(a);
    • Try
      • B(B);
      • Threat
        • QAR1(C),XR(d)
      • Vars
        • K(b);OGATEB,P-FLIGHT,P_SPINP(c),XB(B)::QAR2(C)
      • Refutation
        • R(d);
    • Try
      • B(B);
      • Vars
        • P(c);CHECK,OGATE::QAB1(C),XP(c)
        • R(d);OGATEB::QAR2(C),XR(d)
        • P(c);OGATE::QAR1(C),XP(c)
      • Refutation
        • P(a);
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • P(c);CHECK::QAB1(C),XP(c)
        • R(d);OGATEB::QAR2(C),XR(d)
      • Refutation
        • P(c);
    • Try
      • Q(C);P_PINP(c)
      • Vars
        • R(d);OGATEB::QAR2(C),XR(d)
      • Refutation
        • P(a);
  • Actual
    • B(B);XP(a)
    • Vars
      • P(c);CHECK,OGATE::QAB1(C),XP(c)
      • K(b);P-FLIGHT,XB(B)::QAR2(C),XR(d)
      • R(d);OGATEB::QAR2(C),XR(d)
      • P(c);OGATE::QAR1(C),XP(c)
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