MESON Chess Problem Database

Problem Display
PID: 56929 (8/NK4n1/pBP5/p1R1P1Rp/1P1k1p2/5P2/b1B1p3/2bN3Q w - - 0 1)

Bruchner, Siegfried

Troll, 1994

8/NK4n1/pBP5/p1R1P1Rp/1P1k1p2/5P2/b1B1p3/2bN3Q

#2

12 + 9

6114 Problemschach-Jahrbuch (1994) 1995

SOLUTION

  • SOUND
  • Sets
    • 1...Bb2
      • 2.Qg1#
    • 1...Ba3
      • 2.Qg1#
    • 1...Bc4
      • 2.Rxa5#
      • 2.Rb5#
    • 1...Bd5
      • 2.Rc3#
  • Tries
    • 1.Rd5+?
      • 1...Kc4
        • 2.Rd4#
      • 1...Kxd5!
    • 1.Qe1?
      • threat
        • 2.Qc3#
      • 1...exd1S
        • 2.Qe4#
      • 1...Bb2
        • 2.Qd2#
        • 2.Qf2#
        • 2.Qg1#
      • 1...Bd2
        • 2.Qxd2#
      • 1...axb4!
  • Keys
    • 1.Se3!
      • threat
        • 2.Rc4#
      • 1...Kxe3
        • 2.Rd5#
      • 1...Bxe3
        • 2.Qa1#
      • 1...fxe3
        • 2.Qh4#
      • 1...Bc4
        • 2.Rxc4#
      • 1...Sf5
        • 2.Sxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::QAB(B)
    • B(b);P_PINP(J),SBLOCK::B(I)+R(F)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • K(d);P-FLIGHT::R1(F)
      • Refutation
        • K(d);P-FLIGHT,XR(F)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • P(c);OGATE,XS(A)::QAR1(B)
        • B(a);N_GUARD::QAR2(B),XB(a)
      • Refutation
        • P(f);XP(E)
  • Actual
    • S(A);
    • Threat
      • B(I)+R(F),DCHECK
    • Vars
      • K(d);S_FLIGHT,XS(A)::B(I)+R(F)
      • B(a);OGATE,SBLOCK,XS(A)::QAB(B)
      • P(e);OGATEB,SBLOCK,XS(A)::QAR(B)
      • B(b);::B(I)+R(F),DCHECK,XB(b)
      • S(i);N_GUARD::S(A),XS(i)
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