MESON Chess Problem Database

Problem Display
PID: 15130 (3R4/8/8/8/Q5b1/8/2r5/4k1K1 w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1980

3R4/8/8/8/Q5b1/8/2r5/4k1K1

#2

3 + 3

3295 Einfuhrung in die Welt des Schachproblem 1984

SOLUTION

  • SOUND
  • Sets
    • 1...Ke2
      • 2.Qe4#
    • 1...Re2
      • 2.Rd1#
      • 2.Qd1#
      • 2.Qa1#
    • 1...Be2
      • 2.Qh4#
  • Tries
    • 1.Qxc2?
      • threat
        • 2.Qd2#
        • 2.Qf2#
      • 1...Be2
        • 2.Qd2#
        • 2.Qc3#
      • 1...Bd7!
    • 1.Qb4+?
      • 1...Ke2
        • 2.Qe4#
      • 1...Rd2
        • 2.Qxd2#
      • 1...Rc3!
  • Keys
    • 1.Qe4+!
      • 1...Re2
        • 2.Qb1#
      • 1...Be2
        • 2.Qh4#

This is a version of 232383

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::QAR2(B)
    • B(c);OGATE,SBLOCK::QAB(B)
  • Tries
    • Try
      • Q(B);XR(b)
      • Threat
        • DUALS(2)
      • Refutation
        • B(c);
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
        • R(b);N_GUARD,P_SPINR(b)::QAB1(B),XR(b)
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • Q(B);CHECK
    • Vars
      • R(b);OGATE,P_SPINR(b),SBLOCK::QAR(B)
      • B(c);OGATE,P_SPINB(c),SBLOCK::QAB(B)
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