MESON Chess Problem Database

Problem Display
PID: 91889 (8/8/8/1Q6/3BN3/k7/6r1/K5b1 w - - 0 1)

Gruber, Hans

Jugend Schach, 1980

8/8/8/1Q6/3BN3/k7/6r1/K5b1

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb2
      • 2.Bxb2#
    • 1...Rf2
      • 2.Bc5#
    • 1...Rg3
      • 2.Bb2#
    • 1...Rg4
      • 2.Bb2#
    • 1...Rg5
      • 2.Bb2#
    • 1...Rg6
      • 2.Bb2#
    • 1...Rg7
      • 2.Bb2#
    • 1...Rg8
      • 2.Bb2#
    • 1...Bf2
      • 2.Bb2#
    • 1...Bh2
      • 2.Bc5#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Sb1#
        • 2.Qa4#
      • 1...Bxd4
        • 2.Qa4#
      • 1...Rb2
        • 2.Qa4#
        • 2.Qxb2#
      • 1...Ra2+!
  • Keys
    • 1.Sf2!
      • threat
        • 2.Bb2#
        • 2.Bc5#
      • 1...Rxf2
        • 2.Bc5#
      • 1...Bxf2
        • 2.Bb2#
      • 1...Rg4
        • 2.Bb2#
      • 1...Rg5
        • 2.Bb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • R(b);N_GUARD::B(B),XR(b)
    • R(b);S_CUTB(a)::B(B)
    • R(b);N_GUARD::B(B)
    • B(a);S_CUTR(b)::B(B)
    • B(a);N_GUARD,SBLOCK::B(B)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);P_PINS(C),XB(B)::QAR1(D)
      • Refutation
        • R(b);CHECK
  • Actual
    • S(C);
    • Threat
      • DUALS(2)
    • Vars
      • R(b);XS(C)::B(B)
      • B(a);XS(C)::B(B)
      • R(b);::B(B)
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