MESON Chess Problem Database

Problem Display
PID: 46660 (8/2q2p1Q/b3pP2/2PR1pPp/r3k3/1BP1pR1r/1N3PP1/3NKn2 w - - 0 1)

Bruch, Wieland

3rd Prize, The Problemist, 1999/II

8/2q2p1Q/b3pP2/2PR1pPp/r3k3/1BP1pR1r/1N3PP1/3NKn2

#2

13 + 11

56 The Problemist 2003
23 Die Schwalbe 2007

SOLUTION

  • SOUND
  • Sets
    • 1...exf2+
      • 2.Sxf2#
    • 1...exd5
      • 2.Qxf5#
    • 1...e5
      • 2.Qxf5#
  • Tries
    • 1.Rdxf5?
      • threat
        • 2.Rd5#
      • 1...exf2+
        • 2.Sxf2#
      • 1...Rxf3
        • 2.gxf3#
      • 1...exf5
        • 2.Qxf5#
      • 1...Qf4
        • 2.R3xf4#
      • 1...Qe5
        • 2.R5f4#
      • 1...Rc4
        • 2.Bc2#
      • 1...Sg3
        • 2.Rxe3#
      • 1...e5
        • 2.R5f4#
      • 1...Bc4!
  • Keys
    • 1.Rfxf5!
      • threat
        • 2.Rf3#
      • 1...exf2+
        • 2.Rxf2#
      • 1...exd5
        • 2.Bxd5#
      • 1...exf5
        • 2.Qxf5#
      • 1...Qf4
        • 2.Rfe5#
      • 1...Qe5
        • 2.Rdxe5#
      • 1...Rf3
        • 2.Rxf3#
        • 2.gxf3#
      • 1...Rc4
        • 2.Bc2#
      • 1...Bc4
        • 2.Rd4#
      • 1...Sg3
        • 2.f3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • P(b);CHECK,XP(D)::S(A),XP(b)
    • P(i);N_GUARD,XR(J)::QAB1(M),XP(f)
    • P(i);N_GUARD::QAB1(M),XP(f)
  • Tries
    • Try
      • R(J);XP(f)
      • Threat
        • QAB(M)+R(J)
      • Vars
        • P(b);CHECK,XP(D)::S(A),XP(b)
        • R(c);OGATE,XR(H)::P(E),XR(c)
        • P(i);OGATE,P_SPINP(i),XR(J)::QAB1(M),XP(i)
        • Q(j);N_GUARD::R1(H),XQ(j)
        • Q(j);SBLOCK::QAB(M)+R(J),DCHECK
        • R(d);S_CUTB(h)::B(F)
        • S(a);N_GUARD,S_CUTR(c)::R1(H),XP(b)
        • P(i);SBLOCK::QAB(M)+R(J),DCHECK
      • Refutation
        • B(h);
  • Actual
    • R(H);XP(f)
    • Threat
      • QAB(M)+R(H)
    • Vars
      • P(b);CHECK,OGATE,XP(D)::QAB(M)+R(H),XP(b)
      • P(i);OGATE,XR(J)::B(F),XP(i)
      • P(i);OGATE,P_SPINP(i),XR(H)::QAB1(M),XP(i)
      • Q(j);SBLOCK::QAB(M)+R(H),DCHECK
      • Q(j);N_GUARD::R1(J),XQ(j)
      • R(d);S_CUTB(h)::B(F)
      • B(h);S_CUTR(d)::R1(J)
      • S(a);S_CUTR(c)::P(D)
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