MESON Chess Problem Database

Problem Display
PID: 172155 (8/2p4K/n4Q2/4N3/Pp1krN1R/2q1pP2/1PB1P3/1bR5 w - - 0 1)

Apro, Laszlo

4th HM., Mat, 1973

8/2p4K/n4Q2/4N3/Pp1krN1R/2q1pP2/1PB1P3/1bR5

#2

11 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Rd1#
    • 1...c5
      • 2.Qd6#
    • 1...c6
      • 2.Qd6#
  • Keys
    • 1.Bb3!
      • threat
        • 2.Se6#
      • 1...Rxf4+
        • 2.Sd3#
      • 1...Rxe5+
        • 2.Sd3#
      • 1...Kc5
        • 2.Sd7#
      • 1...Qxb3
        • 2.Sc6#
      • 1...Qc4
        • 2.Rxc4#
      • 1...Qc6
        • 2.Sxc6#
      • 1...Sc5
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • Q(b);N_GUARD,SBLOCK::R(A)
    • P(h);N_GUARD::QAR2(J)
  • Actual
    • B(C);
    • Threat
      • S(G)
    • Vars
      • R(f);CHECK,N_GUARD,P_SPINR(f),XS(G)::QAB(J)+S(I)
      • R(f);CHECK,P_SPINR(f),XS(I)::R(H)+S(G)
      • K(e);P_SPINQ(b),S_FLIGHT::S(I)
      • Q(b);XB(C)::QAB(J)+S(I),DCHECK
      • Q(b);OGATE::R1(A),XQ(b)
      • Q(b);::QAB(J)+S(I),DCHECK,XQ(b)
      • S(g);SBLOCK::QAB(J)+S(I),DCHECK
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