MESON Chess Problem Database

Problem Display
PID: 71309 (1b2K3/4Q2b/1r2P1p1/3Nk3/1n1N2P1/3P4/1qpPP3/4RRBB w - - 0 1)

Bruch, Wieland

2nd Prize, The Problemist, 2004

1b2K3/4Q2b/1r2P1p1/3Nk3/1n1N2P1/3P4/1qpPP3/4RRBB

#2

13 + 8

56 The Problemist 2006
23 Die Schwalbe 2009
15323 FIDE Album (2004-2006) 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Qg5#
      • 2.Qf6#
      • 2.Qg7#
    • 1...Rxe6
      • 2.Qxe6#
    • 1...Bd6
      • 2.Qg5#
      • 2.Qf6#
      • 2.Qg7#
    • 1...Sxd3
      • 2.exd3#
  • Tries
    • 1.Sb3?
      • threat
        • 2.Bh2#
      • 1...Qxb3
        • 2.d4#
      • 1...Sxd3
        • 2.exd3#
      • 1...Qd4
        • 2.Bxd4#
      • 1...Sxd5!
    • 1.Sxb6?
      • threat
        • 2.Sc4#
        • 2.Sd7#
      • 1...c1Q
        • 2.Sd7#
      • 1...c1R
        • 2.Sd7#
      • 1...Qc3
        • 2.Sd7#
      • 1...Qa2
        • 2.Sd7#
      • 1...Qb3
        • 2.Sd7#
      • 1...Qxd4!
    • 1.Qc7+?
      • 1...Rd6
        • 2.Qg7#
      • 1...Bxc7!
    • 1.Qd7?
      • threat
        • 2.Sf3#
      • 1...Rxe6+
        • 2.Qxe6#
      • 1...Sxd3
        • 2.exd3#
      • 1...Sxd5
        • 2.Qxd5#
      • 1...Rd6
        • 2.Qg7#
      • 1...Bd6
        • 2.Qg7#
      • 1...Qxd4!
    • 1.e3?
      • threat
        • 2.Bh2#
      • 1...Qxd4
        • 2.exd4#
      • 1...Sxd5
        • 2.Sf3#
      • 1...Sxd3!
  • Keys
    • 1.e4!
      • threat
        • 2.Sf3#
      • 1...Qxd4
        • 2.Bh2#
      • 1...Sxd5
        • 2.exd5#

This is a version of 56323

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(e);OGATE,P_PINQ(L),P_SPINR(e),XP(K)::QAR1(L),XR(e)
    • S(c);OGATE,XP(G)::R(A)+P(F),XS(c)
  • Tries
    • Try
      • S(H);
      • Threat
        • B(C)
      • Vars
        • Q(a);N_GUARD,XS(H)::P(G)
        • S(c);OGATE,XP(G)::R(A)+P(F),XS(c)
        • Q(a);N_GUARD::B(C),XQ(a)
      • Refutation
        • S(c);XS(J)
    • Try
      • S(J);XR(e)
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::S(J)
        • Q(a);::S(J)
      • Refutation
        • Q(a);XS(H)
    • Try
      • Q(L);CHECK
      • Vars
        • R(e);P_SPINR(e),SBLOCK::QAB(L)
      • Refutation
        • B(h);XQ(L)
    • Try
      • Q(L);
      • Threat
        • S(H)
      • Vars
        • R(e);CHECK,OGATE,XP(K)::QAR1(L),XR(e)
        • S(c);OGATE,XP(G)::R(A)+P(F),XS(c)
        • S(c);OGATE,XS(J)::QAR1(L),XS(c)
        • R(e);SBLOCK::QAB(L)
        • B(h);SBLOCK::QAB(L)
      • Refutation
        • Q(a);XS(H)
    • Try
      • P(F);
      • Threat
        • B(C)
      • Vars
        • Q(a);OGATE,XS(H)::R(A)+P(F)DCHECK,XQ(a)
        • S(c);SBLOCK,XS(J)::S(H)
      • Refutation
        • S(c);XP(G)
  • Actual
    • P(F);
    • Threat
      • S(H)
    • Vars
      • Q(a);SBLOCK,XS(H)::B(C)
      • S(c);OGATE,XS(J)::R(A)+P(F),XS(c)
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