MESON Chess Problem Database

Problem Display
PID: 228268 (5RB1/4p3/4p3/3p2pr/R1Npk3/rQ2N1P1/Pb2P2p/1KB1nn2 w - - 0 1)

Aygues, J

SEPA, 1944

5RB1/4p3/4p3/3p2pr/R1Npk3/rQ2N1P1/Pb2P2p/1KB1nn2

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rh7
      • 2.Bxh7#
    • 1...Sd3
      • 2.exd3#
    • 1...Sf3
      • 2.exf3#
    • 1...g4
      • 2.Rf4#
    • 1...e5
      • 2.Bxd5#
  • Tries
    • 1.Sg4?
      • threat
        • 2.Sf2#
      • 1...Sd2+
        • 2.Sxd2#
      • 1...dxc4
        • 2.Qb7#
      • 1...d3
        • 2.Sd2#
        • 2.Sd6#
      • 1...Sd3
        • 2.exd3#
      • 1...h1S!
    • 1.Sd2+?
      • 1...Ke5
        • 2.Qb8#
      • 1...Sxd2+!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Re5#
      • 1...Sd2+
        • 2.Sxd2#
      • 1...Sxg3
        • 2.Sd2#
      • 1...dxe3
        • 2.Sd6#
      • 1...dxc4
        • 2.Qb7#
      • 1...exf5
        • 2.Bxd5#
      • 1...d3
        • 2.Sd6#
      • 1...Sd3
        • 2.exd3#
      • 1...Sf3
        • 2.exf3#
      • 1...g4
        • 2.Rf4#
      • 1...e5
        • 2.Bxd5#
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • R(j);N_GUARD::B(K),XR(j)
    • S(a);OGATE::P(D),XS(a)
    • P(i);N_GUARD::R1(J)
    • P(k);OGATE::B(K),XP(h)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • S(b);CHECK,N_GUARD::S(I),XS(b)
        • P(h);OGATEB,XS(I)::QAB(E)
        • S(a);OGATE::P(D),XS(a)
      • Refutation
        • P(d);
    • Try
      • S(I);CHECK,P_PINP(f)
      • Vars
        • K(g);N_SPINP(f),P-FLIGHT::QAB(E)
      • Refutation
        • S(b);CHECK,XS(I)
  • Actual
    • R(J);
    • Threat
      • R1(J)
    • Vars
      • S(b);CHECK,N_GUARD::S(I),XS(b)
      • S(b);N_GUARD,XP(G)::S(I)
      • P(f);XS(F)::R(H)+S(I),DCHECK
      • P(h);OGATEB,XS(I)::QAB(E)
      • P(k);OGATE,XR(J)::B(K),XP(h)
      • P(f);::R(H)+S(I),DCHECK
      • S(a);OGATE::P(D),XS(a)
      • P(i);N_GUARD::R1(J)
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