MESON Chess Problem Database

Problem Display
PID: 172092 (K7/3N1Rn1/1p1pp2b/3NB3/1pB1k3/2P1P3/1Qp2rP1/5R2 w - - 0 1)

Apro, Laszlo

Schakend Nederland, 1976

K7/3N1Rn1/1p1pp2b/3NB3/1pB1k3/2P1P3/1Qp2rP1/5R2

#2

11 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf1
      • 2.Qxc2#
    • 1...Rf3
      • 2.Qxc2#
      • 2.gxf3#
    • 1...Rf4
      • 2.Qxc2#
    • 1...Rf5
      • 2.Qxc2#
    • 1...Rf6
      • 2.Qxc2#
    • 1...Rxf7
      • 2.Qxc2#
  • Tries
    • 1.Rf4+?
      • 1...Rxf4
        • 2.Qxc2#
      • 1...Bxf4!
  • Keys
    • 1.cxb4!
      • threat
        • 2.Qd4#
      • 1...Bxe3
        • 2.Sc3#
      • 1...dxe5
        • 2.Qxe5#
      • 1...Rd2
        • 2.S7f6#
      • 1...Sf5
        • 2.S7f6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • R(b);N_GUARD,XR(A)::QAB(B),XP(a)
    • R(b);N_GUARD::QAB(B),XP(a)
    • R(b);N_GUARD,XR(J)::QAB(B),XP(a)
  • Tries
    • Try
      • R(J);CHECK
      • Vars
        • R(b);XR(J)::QAB(B),XP(a)
      • Refutation
        • B(h);XR(J)
  • Actual
    • P(D);XP(c)
    • Threat
      • QAR1(B)
    • Vars
      • B(h);SBLOCK,XP(E)::S(G)
      • P(f);OGATE,XB(H)::QAR1(B),XP(f)
      • R(b);N_GUARD::S(I)
      • S(i);SBLOCK,S_CUTR(b)::S(I)
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