MESON Chess Problem Database

Problem Display
PID: 259434 (8/p2RB3/4n3/Kp3N2/1pk1rN2/4n1Rr/1PP5/8 w - - 0 1)

Cheylan, Yves

Probleemblad, 1985

8/p2RB3/4n3/Kp3N2/1pk1rN2/4n1Rr/1PP5/8

#2

8 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Sxe3#
    • 1...Rxf4
      • 2.Sxe3#
    • 1...Sd1
      • 2.b3#
    • 1...Sf1
      • 2.b3#
    • 1...Sxc2
      • 2.b3#
    • 1...Sg2
      • 2.b3#
    • 1...Sg4
      • 2.b3#
    • 1...Sd5
      • 2.b3#
    • 1...Sxf5
      • 2.b3#
    • 1...Sg5
      • 2.Rc7#
    • 1...Sc7
      • 2.Rxc7#
    • 1...Sg7
      • 2.Rc7#
    • 1...Sf8
      • 2.Rc7#
  • Tries
    • 1.Bxb4?
      • threat
        • 2.b3#
      • 1...Sd4
        • 2.Sd6#
      • 1...Sc5!
    • 1.Rd3?
      • threat
        • 2.b3#
      • 1...Sc5
        • 2.Sd6#
      • 1...b3
        • 2.Rc3#
        • 2.cxb3#
      • 1...Sd4!
    • 1.Rd4+?
      • 1...Rxd4
        • 2.Sxe3#
      • 1...Sxd4!
    • 1.Rc7+?
      • 1...Sc5
        • 2.Rxc5#
      • 1...Sxc7!
  • Keys
    • 1.Rd5!
      • threat
        • 2.Sd6#
      • 1...Rxf4
        • 2.Sxe3#
      • 1...Sxd5
        • 2.b3#
      • 1...Sxf5
        • 2.b3#
      • 1...Sxf4
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • R(e);N_GUARD::S(F),XS(a)
    • R(e);N_GUARD,XS(D)::S(F),XS(a)
    • S(a);::P(A)
    • S(a);XP(B)::P(A)
    • S(a);XS(F)::P(A)
    • S(g);N_GUARD::R(G)
    • S(g);N_GUARD::R(G),XS(g)
  • Tries
    • Try
      • B(H);XP(c)
      • Threat
        • P(A)
      • Vars
        • S(g);SBLOCK::S(F)
      • Refutation
        • S(g);
    • Try
      • R(G);
      • Threat
        • P(A)
      • Vars
        • S(g);SBLOCK::S(F)
      • Refutation
        • S(g);
    • Try
      • R(G);CHECK
      • Vars
        • R(e);SBLOCK,XR(G)::S(F),XS(a)
      • Refutation
        • S(g);XR(G)
    • Try
      • R(G);CHECK
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::R1(G),XS(g)
      • Refutation
        • S(g);XR(G)
  • Actual
    • R(G);
    • Threat
      • S(F)
    • Vars
      • R(e);N_GUARD,XS(D)::S(F),XS(a)
      • S(a);XR(G)::P(A)
      • S(a);XS(F)::P(A)
      • S(g);N_GUARD,XS(D)::R1(G)
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