MESON Chess Problem Database

Problem Display
PID: 172087 (1N2bB2/3N4/1ppnpp2/1rpkpr2/3n4/1P3P2/Q2K4/3R3B w - - 0 1)

Apro, Laszlo

Tijdschrift vd KNSB, 1937

1N2bB2/3N4/1ppnpp2/1rpkpr2/3n4/1P3P2/Q2K4/3R3B

#2

9 + 12

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb3
      • 2.Sxb6#
    • 1...Ra5
      • 2.Sxb6#
    • 1...Rxf3
      • 2.Sxf6#
    • 1...Rg5
      • 2.Sxf6#
    • 1...Rh5
      • 2.Sxf6#
    • 1...Sc2
      • 2.Kxc2#
    • 1...Se2
      • 2.Kxe2#
    • 1...Sxb3+
      • 2.Kc3#
    • 1...Sxf3+
      • 2.Ke3#
    • 1...Sc4+
      • 2.bxc4#
    • 1...Se4+
      • 2.fxe4#
  • Keys
    • 1.Sa6!
      • threat
        • 2.Sc7#
      • 1...Sxb3+
        • 2.Kc3#
      • 1...Sxf3+
        • 2.Ke3#
      • 1...Sc4+
        • 2.bxc4#
      • 1...Se4+
        • 2.fxe4#
      • 1...Rxb3
        • 2.Sxb6#
      • 1...Rxf3
        • 2.Sxf6#
      • 1...Sc2
        • 2.Kxc2#
      • 1...Se2
        • 2.Kxe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • R(b);N_GUARD,P_SPINR(b),XP(E)::S(G),XP(g)
    • R(b);N_GUARD::S(G),XP(g)
    • R(f);N_GUARD,P_SPINR(f),XP(F)::S(G),XP(k)
    • R(f);N_GUARD::S(G),XP(k)
    • S(a);::R(A)+K(D),XS(a)
    • S(a);CHECK,P_SPINS(a),XP(E)::R(A)+K(D)
    • S(a);CHECK,P_SPINS(a),XP(F)::R(A)+K(D)
    • S(i);CHECK,OGATE::P(E),XS(i)
    • S(i);CHECK,OGATE::P(F),XS(i)
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • S(a);CHECK,P_SPINS(a),XP(E)::R(A)+K(D)
      • S(a);CHECK,P_SPINS(a),XP(F)::R(A)+K(D)
      • S(i);CHECK,OGATE::P(E),XS(i)
      • S(i);CHECK,OGATE::P(F),XS(i)
      • R(b);N_GUARD,P_SPINR(b),XP(E)::S(G),XP(g)
      • R(f);N_GUARD,P_SPINR(f),XP(F)::S(G),XP(k)
      • S(a);::R(A)+K(D),XS(a)
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