MESON Chess Problem Database

Problem Display
PID: 234505 (1k6/7r/1K1N1p2/7b/4Q3/8/8/8 w - - 0 1)

Speckmann, Werner

Il Due Mosse, 1959

1k6/7r/1K1N1p2/7b/4Q3/8/8/8

#2

3 + 4

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rh6
      • 2.Qb7#
    • 1...Rb7+
      • 2.Qxb7#
    • 1...Rf7
      • 2.Qe8#
    • 1...Rh8
      • 2.Qb7#
    • 1...Bd1
      • 2.Qe8#
    • 1...Be2
      • 2.Qe8#
    • 1...Bf3
      • 2.Qe8#
    • 1...Bf7
      • 2.Qb7#
    • 1...Be8
      • 2.Qxe8#
  • Tries
    • 1.Qxh7?
      • threat
        • 2.Qa7#
        • 2.Qb7#
      • 1...Ka8
        • 2.Qa7#
        • 2.Qb7#
      • 1...Bf3
        • 2.Qg8#
        • 2.Qa7#
        • 2.Qh8#
      • 1...Bf7!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Qb7#
        • 2.Qe8#
      • 1...Kc8
        • 2.Qb7#
        • 2.Qe8#
      • 1...Rxf7
        • 2.Qe8#
      • 1...Bxf7
        • 2.Qb7#
      • 1...Rh8
        • 2.Qb7#
      • 1...Bf3
        • 2.Qe8#
      • 1...Bg4
        • 2.Qb7#

Anticipated by 6119(1927), 6763(1933)

This is a version of 234504

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • R(c);N_GUARD::QAR1(A)
    • R(c);CHECK,N_GUARD::QAR1(A),XR(c)
    • R(c);S_CUTB(a)::QAR(A)
    • B(a);N_GUARD::QAR(A)
    • B(a);S_CUTR(c)::QAR1(A)
    • B(a);N_GUARD::QAR(A),XB(a)
  • Tries
    • Try
      • Q(A);XR(c)
      • Threat
        • DUALS(2)
      • Refutation
        • B(a);
  • Actual
    • S(C);
    • Threat
      • DUALS(2)
    • Vars
      • R(c);XS(C)::QAR(A)
      • B(a);XS(C)::QAR1(A)
      • R(c);::QAR1(A)
      • B(a);::QAR(A)
      • B(a);::QAR1(A)
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