MESON Chess Problem Database

Problem Display
PID: 207147 (Q4Rb1/4NNR1/1p2p2K/5P2/1r1p1k1p/5rpp/3P2n1/B2Bn3 w - - 0 1)

Papic, Ljubisa

Stojnic, Dragan

Zadachi i Etyudi, 2018

Q4Rb1/4NNR1/1p2p2K/5P2/1r1p1k1p/5rpp/3P2n1/B2Bn3

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.Rg4#
    • 1...Rf2
      • 2.Rg4#
    • 1...Ra3
      • 2.Rg4#
    • 1...Rfb3
      • 2.Rg4#
    • 1...Rc3
      • 2.Rg4#
    • 1...Rd3
      • 2.Rg4#
    • 1...Re3
      • 2.Rg4#
    • 1...Sc2
      • 2.Qxf3#
    • 1...Sd3
      • 2.Qxf3#
    • 1...d3
      • 2.Be5#
  • Tries
    • 1.Sg6+?
      • 1...Kg4
        • 2.Sfe5#
      • 1...Kxf5!
    • 1.Bxf3?
      • threat
        • 2.Rg4#
        • 2.Qe4#
      • 1...Bxf7
        • 2.Qe4#
      • 1...exf5
        • 2.Sg6#
      • 1...Se3
        • 2.Qe4#
      • 1...d3
        • 2.Be5#
        • 2.Rg4#
      • 1...Sxf3!
    • 1.Qb8+?
      • 1...e5
        • 2.Qxe5#
      • 1...Ke4!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Qe4#
      • 1...Kg4
        • 2.Sxe6#
      • 1...Ke5
        • 2.Qb8#
      • 1...Re3
        • 2.Sg6#
      • 1...d3
        • 2.Sxh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • R(c);::R1(H)
    • S(a);N_GUARD::QAR1(I),XR(c)
    • P(g);OGATE::B(A)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(h);P-FLIGHT,P_SPINR(c)::S(G)
      • Refutation
        • K(h);P-FLIGHT,XP(D)
    • Try
      • B(B);XR(c)
      • Threat
        • DUALS(2)
      • Vars
        • B(l);XS(G)::QAR1(I)
        • P(k);SBLOCK,XP(D)::S(F)
        • S(b);::QAR1(I)
      • Refutation
        • S(a);XB(B)
    • Try
      • Q(I);CHECK
      • Vars
        • P(k);P_SPINP(k)::QAB1(I),XP(k)
      • Refutation
        • K(h);P-FLIGHT
  • Actual
    • S(G);
    • Threat
      • QAR1(I)
    • Vars
      • K(h);P-FLIGHT,P_SPINR(c)::R(H)+S(G),XP(k)
      • K(h);P_SPINP(g),S_FLIGHT::QAB(I)
      • R(c);::S(F)
      • P(g);::S(G),XP(e)
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Developed and maintained by Brian Stephenson.
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