MESON Chess Problem Database

Problem Display
PID: 176247 (b7/1r1B4/7Q/kp5R/3N3P/1K6/8/8 w - - 0 1)

Matthaus, Hans Georg

Schach-Echo, 1972

b7/1r1B4/7Q/kp5R/3N3P/1K6/8/8

#2

6 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ra7
      • 2.Rxb5#
    • 1...Rc7
      • 2.Rxb5#
    • 1...Rxd7
      • 2.Rxb5#
  • Tries
    • 1.Bxb5?
      • threat
        • 2.Qa6#
      • 1...Rxb5+
        • 2.Rxb5#
      • 1...Rb6
        • 2.Qd2#
      • 1...Ra7!
    • 1.Qd6?
      • 1...Rxd7
        • 2.Rxb5#
      • 1...Rb6
        • 2.Qa3#
      • 1...Ra7
        • 2.Rxb5#
      • 1...Rc7
        • 2.Rxb5#
      • 1...Rb8!
  • Keys
    • 1.Bc8!
      • 1...Rb8
        • 2.Qa6#
      • 1...Rb6
        • 2.Qd2#
      • 1...Ra7
        • 2.Rxb5#
      • 1...Rc7
        • 2.Rxb5#
        • 2.Qa6#
      • 1...Rd7
        • 2.Rxb5#
        • 2.Qa6#
      • 1...Re7
        • 2.Rxb5#
        • 2.Qa6#
      • 1...Rf7
        • 2.Rxb5#
        • 2.Qa6#
      • 1...Rg7
        • 2.Rxb5#
        • 2.Qa6#
      • 1...Rh7
        • 2.Rxb5#
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(c);N_GUARD::R1(D),XP(b)
    • R(c);N_GUARD,XB(F)::R1(D),XP(b)
  • Tries
    • Try
      • B(F);P_SPINB(F),XP(b)
      • Threat
        • QAR1(E)
      • Vars
        • R(c);CHECK,OGATE,P_SPINR(c),XB(F)::R1(D),XR(c)
        • R(c);SBLOCK::QAB(E)
      • Refutation
        • R(c);N_PINB(F)
    • Try
      • Q(E);
      • Vars
        • R(c);N_GUARD,XB(F)::R1(D),XP(b)
        • R(c);SBLOCK::QAR2(E)
        • R(c);N_GUARD::R1(D),XP(b)
      • Refutation
        • R(c);
  • Actual
    • B(F);
    • Vars
      • R(c);::QAR1(E)
      • R(c);SBLOCK::QAB(E)
      • R(c);N_GUARD::R1(D),XP(b)
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