MESON Chess Problem Database

Problem Display
PID: 214623 (3R4/3b4/3b4/3k2N1/8/2Q5/3B1R2/4K3 w - - 0 1)

Riczu, Lajos

Land og Folk, 1975

3R4/3b4/3b4/3k2N1/8/2Q5/3B1R2/4K3

#2

6 + 3

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ba4
      • 2.Rf5#
    • 1...Bb5
      • 2.Rf5#
    • 1...Bf5
      • 2.Rxf5#
    • 1...Bc6
      • 2.Rf5#
    • 1...Be8
      • 2.Rf5#
  • Tries
    • 1.Rf5+?
      • 1...Be5
        • 2.Rxd7#
      • 1...Bxf5!
    • 1.Qc4+?
      • 1...Ke5
        • 2.Sf7#
        • 2.Bc3#
        • 2.Qe4#
      • 1...Kxc4!
  • Keys
    • 1.Be3!
      • threat
        • 2.Rd2#
      • 1...Bg3
        • 2.Qc5#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Be5
        • 2.Qc5#
      • 1...Bb5
        • 2.Rf5#
        • 2.Qc5#
      • 1...Bf5
        • 2.Rxf5#
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • B(c);N_GUARD,P_SPINB(b)::R(C)
    • B(c);N_GUARD,P_SPINB(b)::R(C),XB(c)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • B(b);P_SPINB(b)::R(F),XB(c)
      • Refutation
        • B(c);P_SPINB(b),XR(C)
    • Try
      • Q(D);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(D)
  • Actual
    • B(B);
    • Threat
      • R(C)
    • Vars
      • B(b);N_GUARD,P_PINR(C),P_SPINB(c)::QAR1(D)
      • B(b);N_GUARD,P_SPINB(c)::QAR1(D),XB(b)
      • B(b);N_GUARD,P_SPINB(c),SBLOCK::QAR1(D)
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