MESON Chess Problem Database

Problem Display
PID: 161257 (2R1K3/Bp1BR3/3p4/1p1kNp2/1r3r2/1N1P4/4n1p1/b2Q2q1 w - - 0 1)

Apro, Laszlo

Magyar Sakkelet, 1956

2R1K3/Bp1BR3/3p4/1p1kNp2/1r3r2/1N1P4/4n1p1/b2Q2q1

#2

9 + 11

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe5
      • 2.Be6#
    • 1...b6
      • 2.Bc6#
  • Tries
    • 1.Sg6?
      • threat
        • 2.Be6#
      • 1...Rbe4
        • 2.dxe4#
      • 1...Rfe4
        • 2.dxe4#
      • 1...Sd4
        • 2.Sxf4#
      • 1...Qe3!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Be6#
      • 1...Rbxc4
        • 2.dxc4#
      • 1...Rfxc4
        • 2.dxc4#
      • 1...bxc4
        • 2.dxc4#
      • 1...Qe3
        • 2.Sxe3#
      • 1...Re4
        • 2.dxe4#
      • 1...Sd4
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • B(a);SBLOCK,XS(D)::B(F)
    • P(k);N_GUARD::B(F)
  • Tries
    • Try
      • S(D);
      • Threat
        • B(F)
      • Vars
        • R(e);OGATE,P_PINR(G)::QAR(A)+P(C)DCHECK,XR(e)
        • R(f);OGATE,P_PINR(G)::QAR(A)+P(C)DCHECK,XR(f)
        • S(c);N_GUARD,S_CUTR(e)::S(D),XR(f)
      • Refutation
        • Q(b);P_PINR(G)
  • Actual
    • S(D);
    • Threat
      • B(F)
    • Vars
      • R(e);OGATE,XS(D)::QAR(A)+P(C)DCHECK,XR(e)
      • R(f);OGATE,XS(D)::QAR(A)+P(C)DCHECK,XR(f)
      • P(g);OGATE,XS(D)::QAR(A)+P(C)DCHECK,XP(g)
      • Q(b);N_GUARD,P_PINR(G)::S(D),XQ(b)
      • R(f);OGATE,P_PINR(G)::QAR(A)+P(C)DCHECK,XR(f)
      • S(c);S_CUTQ(b)::S(D)
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