MESON Chess Problem Database

Problem Display
PID: 232388 (3K4/3b4/5k2/6R1/1Q1N4/8/4r3/8 w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1981

3K4/3b4/5k2/6R1/1Q1N4/8/4r3/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Qe7#
    • 1...Rb2
      • 2.Qe7#
    • 1...Rc2
      • 2.Qe7#
    • 1...Rd2
      • 2.Qe7#
    • 1...Rf2
      • 2.Qe7#
    • 1...Rg2
      • 2.Qe7#
    • 1...Rh2
      • 2.Qe7#
    • 1...Re7
      • 2.Qxe7#
    • 1...Be6
      • 2.Qe7#
  • Tries
    • 1.Sxe2?
      • threat
        • 2.Qe7#
      • 1...Ke6
        • 2.Qe7#
      • 1...Kf7
        • 2.Qe7#
      • 1...Kxg5!
  • Keys
    • 1.Se6!
      • threat
        • 2.Qe7#
      • 1...Kxe6
        • 2.Qe7#
      • 1...Kf7
        • 2.Qe7#
      • 1...Rxe6
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • R(a);N_GUARD::QAB1(A)
    • R(a);N_GUARD::QAB1(A),XR(a)
    • B(c);S_CUTR(a)::QAB1(A)
  • Tries
    • Try
      • S(B);XR(a)
      • Threat
        • QAB1(A)
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
  • Actual
    • S(B);
    • Threat
      • QAB1(A)
    • Vars
      • K(b);P-FLIGHT,XS(B)::QAR1(A)
      • K(b);P-FLIGHT::QAR1(A)
      • R(a);SBLOCK,XS(B)::QAR2(A)
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