MESON Chess Problem Database

Problem Display
PID: 151982 (5Qn1/1n1N4/2p1p3/2Pk2rN/2pp2r1/5PP1/1B2PK2/1B6 w - - 0 1)

Pereira, Alvaro

The Problemist, 2013

5Qn1/1n1N4/2p1p3/2Pk2rN/2pp2r1/5PP1/1B2PK2/1B6

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg3
      • 2.Sf4#
      • 2.Be4#
    • 1...Re4
      • 2.Bxe4#
      • 2.fxe4#
    • 1...Rf4
      • 2.Sxf4#
    • 1...Re5
      • 2.Sb6#
    • 1...Sa5
      • 2.Qd6#
    • 1...Sxc5
      • 2.Qxc5#
    • 1...Sd6
      • 2.Qxd6#
    • 1...Sd8
      • 2.Qd6#
    • 1...Sf6
      • 2.Shxf6#
    • 1...Sh6
      • 2.Shf6#
    • 1...Se7
      • 2.Shf6#
    • 1...c3
      • 2.Ba2#
    • 1...d3
      • 2.Sb6#
    • 1...e5
      • 2.Qf7#
  • Tries
    • 1.e4+?
      • 1...Rxe4
        • 2.Bxe4#
        • 2.fxe4#
      • 1...dxe4 ep+!
    • 1.f4?
      • threat
        • 2.Sb6#
      • 1...Rxf4+
        • 2.Sxf4#
      • 1...e5
        • 2.Qf7#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Se7
        • 2.Shf6#
      • 1...d3!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Be4#
      • 1...Rxf4
        • 2.Sxf4#
      • 1...Sxc5
        • 2.Sb6#
      • 1...c3
        • 2.Ba2#
      • 1...e5
        • 2.Qf7#
      • 1...Re5
        • 2.Qxe5#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sf6
        • 2.Shxf6#
      • 1...d3
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • R(c);N_GUARD,P_PINP(E)::S(H),XR(c)
    • R(e);SBLOCK::S(I)
    • S(h);N_GUARD::QAR1(J)
    • S(h);OGATE,XP(G)::QAR1(J),XS(h)
    • S(h);N_GUARD::QAR1(J),XS(h)
    • S(i);N_GUARD::S(H),XS(i)
    • S(i);N_GUARD::S(H)
    • P(a);OGATEB::B(A)
    • P(b);::S(I)
    • P(g);OGATEB::QAB(J)
  • Tries
    • Try
      • P(C);CHECK
      • Refutation
        • P(b);CHECK,EP,XP(C)
    • Try
      • P(E);
      • Threat
        • S(I)
      • Vars
        • R(c);CHECK,XP(E)::S(H),XR(c)
        • P(g);OGATEB::QAB(J)
        • S(h);N_GUARD::QAR1(J),XS(h)
        • S(i);N_GUARD::S(H)
      • Refutation
        • P(b);
  • Actual
    • Q(J);
    • Threat
      • B(A)
    • Vars
      • R(c);P_PINP(E),XQ(J)::S(H),XR(c)
      • S(h);SBLOCK,XP(G)::S(I)
      • P(a);OGATEB::B(A)
      • P(g);OGATEB::QAB(J)
      • R(e);N_GUARD::QAR1(J),XR(e)
      • S(h);N_GUARD::QAR1(J),XS(h)
      • S(i);N_GUARD::S(H),XS(i)
      • P(b);N_GUARD::P(C)
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