MESON Chess Problem Database

Problem Display
PID: 144013 (2N4K/3np3/2n4R/r2k4/3rN3/4Q3/8/2R2B2 w - - 0 1)

Pfeiffer, Mieczyslaw

La Settimana Enigmistica, 1932

(First published on Sat Jun 25 1932)

2N4K/3np3/2n4R/r2k4/3rN3/4Q3/8/2R2B2

#2

7 + 6

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Sc3#
    • 1...Rd2
      • 2.Sc3#
    • 1...Rda4
      • 2.Sc3#
    • 1...Rb4
      • 2.Sc3#
    • 1...Sce5
      • 2.Sxe7#
    • 1...Sc5
      • 2.Sc3#
    • 1...Sde5
      • 2.Sb6#
    • 1...e5
      • 2.Rd6#
  • Tries
    • 1.Bc4+?
      • 1...Ke5
        • 2.Rh5#
      • 1...Rxc4!
    • 1.Rc5+?
      • 1...Sxc5
        • 2.Sc3#
      • 1...Rxc5!
  • Keys
    • 1.Bg2!
      • threat
        • 2.Sf6#
      • 1...Ke5
        • 2.Qg5#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Sf6
        • 2.Sxf6#
      • 1...Sce5
        • 2.Sxe7#
      • 1...Sde5
        • 2.Sb6#
      • 1...e5
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(a);::S(D)
    • S(d);N_GUARD,SBLOCK::S(F),XP(f)
    • S(e);SBLOCK::S(D)
    • S(e);N_GUARD,SBLOCK::S(F)
    • P(f);N_GUARD,SBLOCK::R1(E)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • K(c);P-FLIGHT::R(E)
      • Refutation
        • R(a);XB(B)
    • Try
      • R(A);CHECK
      • Vars
        • S(e);SBLOCK,XR(A)::S(D)
      • Refutation
        • R(b);XR(A)
  • Actual
    • B(B);
    • Threat
      • B(B)+S(D),DCHECK
    • Vars
      • K(c);P-FLIGHT::QAR2(C)
      • R(a);OGATE,P_SPINR(a),XS(D)::QAB1(C),XR(a)
      • S(e);::B(B)+S(D),DCHECK,XS(e)
      • S(d);N_GUARD,SBLOCK::S(F),XP(f)
      • S(e);N_GUARD,SBLOCK::S(F)
      • P(f);N_GUARD,SBLOCK::R1(E)
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