MESON Chess Problem Database

Problem Display
PID: 172150 (2N1B3/8/2p3b1/3k4/1P2RbP1/8/4K3/7Q w - - 0 1)

Apro, Laszlo

Revista Romana de Sah, 1978

2N1B3/8/2p3b1/3k4/1P2RbP1/8/4K3/7Q

#2

7 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bd6
      • 2.Sb6#
    • 1...Bf7
      • 2.Bxf7#
    • 1...Bh7
      • 2.Bf7#
  • Tries
    • 1.Qh8?
      • threat
        • 2.Qd4#
      • 1...Kxe4
        • 2.Bxc6#
      • 1...Bxe4
        • 2.Bf7#
      • 1...Be5
        • 2.Qxe5#
      • 1...Be3
        • 2.Qe5#
      • 1...c5!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qd4#
      • 1...Kxe4
        • 2.Bxc6#
      • 1...Bxe4
        • 2.Bf7#
      • 1...Be5
        • 2.Qxe5#
      • 1...Be3
        • 2.Qe5#
      • 1...c5
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • B(a);SBLOCK::S(F)
    • B(d);N_GUARD::B(G),XB(d)
    • B(d);N_GUARD::B(G)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);S_FLIGHT,XR(D)::B(G),XP(c)
        • B(d);N_GUARD,SBLOCK,XR(D)::B(G)
        • B(a);N_GUARD::QAR1(A),XB(a)
        • B(a);N_GUARD::QAR1(A)
      • Refutation
        • P(c);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(b);S_FLIGHT,XR(D)::B(G),XP(c)
      • B(d);N_GUARD,SBLOCK,XR(D)::B(G)
      • B(a);N_GUARD::QAR1(A),XB(a)
      • B(a);N_GUARD::QAR1(A)
      • P(c);OGATEB::QAB(A)
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