MESON Chess Problem Database

Problem Display
PID: 249388 (8/8/8/4Q3/2p4N/q2k3K/5R2/8 w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1973

8/8/8/4Q3/2p4N/q2k3K/5R2/8

#2

4 + 3

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Sg2?
      • threat
        • 2.Se1#
        • 2.Sf4#
        • 2.Qe3#
      • 1...c3
        • 2.Qd5#
      • 1...Qb4
        • 2.Sf4#
        • 2.Qe3#
      • 1...Qc5
        • 2.Se1#
        • 2.Sf4#
      • 1...Qe7
        • 2.Se1#
        • 2.Sf4#
      • 1...Qf8
        • 2.Se1#
        • 2.Qe3#
      • 1...Qa1
        • 2.Sf4#
        • 2.Qe3#
      • 1...Qc3
        • 2.Sf4#
        • 2.Qe3#
      • 1...Qa5
        • 2.Sf4#
        • 2.Qe3#
      • 1...Qa7
        • 2.Se1#
        • 2.Sf4#
      • 1...Qc1!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Se1#
        • 2.Rd2#
        • 2.Qd4#
      • 1...c3
        • 2.Qd4#
        • 2.Qe2#
      • 1...Qc1
        • 2.Qd4#
      • 1...Qb2
        • 2.Se1#
      • 1...Qb4
        • 2.Qd4#
      • 1...Qc5
        • 2.Se1#
        • 2.Rd2#
      • 1...Qd6
        • 2.Se1#
        • 2.Rd2#
      • 1...Qa1
        • 2.Rd2#
      • 1...Qa2
        • 2.Se1#
        • 2.Qd4#
      • 1...Qc3
        • 2.Qe2#
      • 1...Qa5
        • 2.Qd4#
      • 1...Qa7
        • 2.Se1#
        • 2.Rd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(3)
      • Vars
        • P(c);SBLOCK::QAR2(D)
      • Refutation
        • Q(a);
  • Actual
    • S(C);
    • Threat
      • DUALS(3)
    • Vars
      • Q(a);::QAR1(D)
      • Q(a);::S(C)
      • Q(a);::R1(A)
      • Q(a);SBLOCK::QAB1(D)
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