MESON Chess Problem Database

Problem Display
PID: 225695 (3N2K1/3p3Q/Np1pR3/1p1kp3/3p4/1Pn1p3/4P2B/b1R5 w - - 0 1)

Pituk, Alexander

Praca, 1996

3N2K1/3p3Q/Np1pR3/1p1kp3/3p4/1Pn1p3/4P2B/b1R5

#2

9 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Sb4#
      • 2.Sc7#
    • 1...Sd1
      • 2.Sb4#
      • 2.Sc7#
    • 1...Sa2
      • 2.Sc7#
    • 1...Sxe2
      • 2.Sb4#
      • 2.Sc7#
    • 1...Sa4
      • 2.Sb4#
      • 2.Sc7#
    • 1...Se4
      • 2.Sb4#
      • 2.Sc7#
    • 1...d3
      • 2.Qxd3#
    • 1...e4
      • 2.Rxd6#
      • 2.Qf5#
      • 2.Qh5#
    • 1...dxe6
      • 2.Qb7#
  • Tries
    • 1.Rxc3?
      • threat
        • 2.Sb4#
        • 2.Sc7#
      • 1...dxc3
        • 2.Qd3#
      • 1...d3
        • 2.Qxd3#
      • 1...b4
        • 2.Sxb4#
        • 2.Sc7#
      • 1...Bxc3!
    • 1.Qe4+?
      • 1...Sxe4
        • 2.Sb4#
        • 2.Sc7#
      • 1...Kxe4!
    • 1.Qg6?
      • threat
        • 2.Rxd6#
      • 1...Se4
        • 2.Sb4#
        • 2.Sc7#
      • 1...dxe6!
    • 1.Qf7?
      • threat
        • 2.Rxe5#
      • 1...Ke4
        • 2.Qf3#
      • 1...dxe6
        • 2.Qb7#
      • 1...e4
        • 2.Re5#
        • 2.Rxd6#
        • 2.Rf6#
        • 2.Rg6#
        • 2.Rh6#
        • 2.Re7#
        • 2.Re8#
        • 2.Qh5#
        • 2.Qf5#
      • 1...d3!
  • Keys
    • 1.Sb7!
      • threat
        • 2.Rxd6#
      • 1...Kc6
        • 2.Qe4#
      • 1...Kxe6
        • 2.Qf7#
      • 1...dxe6
        • 2.Sb4#
      • 1...Se4
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(b);::S(E)
    • P(d);OGATEB::QAR2(G),XP(d)
    • P(j);OGATE,XR(F)::QAB(G)
  • Tries
    • Try
      • R(A);XS(b)
      • Threat
        • DUALS(2)
      • Vars
        • P(d);OGATEB,XR(A)::QAR2(G)
        • P(d);OGATEB::QAR2(G),XP(d)
      • Refutation
        • B(a);XR(A)
    • Try
      • Q(G);CHECK
      • Refutation
        • K(f);P_SPINP(g),S_FLIGHT,XQ(G)
    • Try
      • Q(G);
      • Threat
        • R1(F),XP(i)
      • Refutation
        • P(j);XR(F)
    • Try
      • Q(G);
      • Threat
        • QAB(G)+R(F),DCHECK,XP(g)
      • Vars
        • K(f);P_SPINP(g),S_FLIGHT::QAB1(G)
        • P(j);OGATE,P_SPINP(j),XR(F)::QAB(G)
      • Refutation
        • P(d);
  • Actual
    • S(H);
    • Threat
      • R1(F),XP(i)
    • Vars
      • K(f);P_SPINP(i),P_SPINS(b),S_FLIGHT::QAB(G)
      • K(f);OGATEB,S_FLIGHT,XR(F)::QAB1(G)
      • P(j);SBLOCK,XR(F)::S(E)
      • S(b);::S(E)
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