MESON Chess Problem Database

Problem Display
PID: 172110 (8/3R4/K1k1P3/7b/N6r/3N1P2/2B4b/3R4 w - - 0 1)

Apro, Laszlo

Comm., Problemas, 1977

8/3R4/K1k1P3/7b/N6r/3N1P2/2B4b/3R4

#2

8 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rh3
      • 2.Sb4#
    • 1...Rxa4+
      • 2.Bxa4#
    • 1...Rb4
      • 2.Sxb4#
    • 1...Rf4
      • 2.Se5#
    • 1...Bg1
      • 2.Se5#
    • 1...Bf4
      • 2.Sb4#
    • 1...Be5
      • 2.Sxe5#
    • 1...Bg4
      • 2.Sb4#
  • Tries
    • 1.f4?
      • threat
        • 2.Sb4#
        • 2.Se5#
      • 1...Rxf4
        • 2.Se5#
      • 1...Bxf4
        • 2.Sb4#
      • 1...Be2!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Be4#
        • 2.R1d6#
      • 1...Rxf4
        • 2.R1d6#
      • 1...Bxf4
        • 2.Be4#
      • 1...Bxf3
        • 2.R1d6#
      • 1...Bg6
        • 2.R1d6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(b);N_GUARD::S(C)
    • R(b);CHECK,OGATE,XS(E)::B(B),XR(b)
    • R(b);N_GUARD::S(C),XR(b)
    • R(b);S_CUTB(a)::S(C)
    • B(a);N_GUARD::S(C)
    • B(a);S_CUTR(b)::S(C)
    • B(a);N_GUARD::S(C),XB(a)
    • B(c);S_CUTR(b)::S(C)
  • Tries
    • Try
      • P(D);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);XP(D)::S(C)
        • B(a);XP(D)::S(C)
      • Refutation
        • B(c);P_PINS(C)
  • Actual
    • S(C);
    • Threat
      • DUALS(2)
    • Vars
      • R(b);XS(C)::R1(A)
      • B(a);XS(C)::B(B)
      • B(c);XP(D)::R1(A)
      • B(c);::R1(A)
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