MESON Chess Problem Database

Problem Display
PID: 171996 (b3N1K1/R2B4/4P3/p2kbPn1/r2P4/3P1P2/4N2B/4R2q w - - 0 1)

Apro, Laszlo

3rd Prize, Magyar Sakkszovetseg, 1969

b3N1K1/R2B4/4P3/p2kbPn1/r2P4/3P1P2/4N2B/4R2q

#2

12 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4
      • 2.Rxa5#
    • 1...Bd6
      • 2.Sf6#
    • 1...Bf6
      • 2.Sxf6#
      • 2.Sc7#
    • 1...Bc7
      • 2.Sf6#
      • 2.Sxc7#
    • 1...Bg7
      • 2.Sc7#
    • 1...Bb8
      • 2.Sf6#
    • 1...Bh8
      • 2.Sc7#
  • Tries
    • 1.Rc1?
      • threat
        • 2.Rc5#
      • 1...Rxd4
        • 2.Rxa5#
      • 1...Bxd4
        • 2.Sc7#
      • 1...Sxe6
        • 2.Bxe6#
      • 1...Rc4
        • 2.dxc4#
      • 1...Bd6
        • 2.Sf6#
      • 1...Se4
        • 2.dxe4#
      • 1...Qxc1!
  • Keys
    • 1.Rc7!
      • threat
        • 2.Rc5#
      • 1...Rxd4
        • 2.Sc3#
      • 1...Bxd4
        • 2.Sf4#
      • 1...Bxc7
        • 2.Sf6#
        • 2.Sxc7#
      • 1...Sxe6
        • 2.Bxe6#
      • 1...Rc4
        • 2.dxc4#
      • 1...Bd6
        • 2.Sf6#
      • 1...Bc6
        • 2.Bxc6#
      • 1...Se4
        • 2.dxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • R(b);N_GUARD,XP(F)::R(I),XP(c)
    • B(e);N_GUARD::S(K)
  • Tries
    • Try
      • R(A);
      • Threat
        • R1(A)
      • Vars
        • R(b);N_GUARD,XP(F)::R(I),XP(c)
        • B(e);N_GUARD,XP(F)::S(K)
        • S(f);OGATE,XP(H)::B(J),XS(f)
        • R(b);OGATE::P(D),XR(b)
        • B(e);N_GUARD::S(K)
        • S(f);OGATE::P(D),XS(f)
      • Refutation
        • Q(a);XR(A)
  • Actual
    • R(I);
    • Threat
      • R1(I)
    • Vars
      • R(b);SBLOCK,XP(F)::S(B)
      • B(e);N_GUARD,SBLOCK,XP(F)::S(B)
      • S(f);OGATE,XP(H)::B(J),XS(f)
      • R(b);OGATE::P(D),XR(b)
      • B(e);N_GUARD::S(K)
      • B(g);N_GUARD::B(J),XB(g)
      • S(f);OGATE::P(D),XS(f)
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