MESON Chess Problem Database

Problem Display
PID: 48263 (2qR3B/2pn1p2/2b2P2/2r5/2pkPQpN/1PN3p1/3PP1K1/2R5 w - - 0 1)

Stojnic, Dragan

Die Schwalbe, 2003

2qR3B/2pn1p2/2b2P2/2r5/2pkPQpN/1PN3p1/3PP1K1/2R5

#2

12 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Qe3#
    • 1...Ba4
      • 2.e5#
    • 1...Bxe4+
      • 2.Qxe4#
    • 1...Bb5
      • 2.e5#
    • 1...Bd5
      • 2.Sf5#
      • 2.exd5#
  • Tries
    • 1.Sb5+?
      • 1...Rxb5
        • 2.Rxc4#
      • 1...Bxb5!
    • 1.Qd6+?
      • 1...Rd5
        • 2.Sf5#
      • 1...Bd5
        • 2.Sf5#
      • 1...cxd6!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Sf5#
      • 1...Rxd5
        • 2.Rxc4#
      • 1...Sxf6
        • 2.Bxf6#
      • 1...Ra5
        • 2.Rxc4#
      • 1...Rb5
        • 2.Rxc4#
      • 1...Se5
        • 2.Qe3#
      • 1...Sb6
        • 2.e5#
      • 1...Sb8
        • 2.e5#
      • 1...Sf8
        • 2.e5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 4
  • Sets
    • R(e);SBLOCK::QAB1(H)
    • B(f);N_PINP(G)::QAR(H)+P(G)
    • B(f);CHECK,OGATE,P_SPINB(f),XP(G)::QAR1(H),XB(f)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • R(e);XS(F)::R1(A),XP(b)
      • Refutation
        • B(f);N_PINP(G),XS(F)
    • Try
      • Q(H);CHECK,N_PINS(h)
      • Vars
        • R(e);N_PINP(G),P_SPINR(e)::S(I)
        • B(f);P_SPINB(f)::S(I)
      • Refutation
        • P(g);XQ(H)
  • Actual
    • S(F);N_PINS(h),N_SPINP(G)
    • Threat
      • S(I)
    • Vars
      • R(e);N_GUARD,XS(F)::R1(A),XP(b)
      • S(h);OGATE,P_SPINS(h),XP(J)::B(L),XS(h)
      • R(e);N_GUARD::R1(A),XP(b)
      • S(h);SBLOCK::QAB1(H)
      • S(h);::QAR(H)+P(G)
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