MESON Chess Problem Database

Problem Display
PID: 258762 (8/3R3n/1Kn3B1/2N5/2krp2R/1p1Np3/1P4Q1/8 w - - 0 1)

Popa, Nicolae

3rd HM., Buletin Problemistic, 1986

8/3R3n/1Kn3B1/2N5/2krp2R/1p1Np3/1P4Q1/8

#2

8 + 7

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Se5#
  • Tries
    • 1.Rxd4+?
      • 1...Kxd4
        • 2.Qxe4#
      • 1...Sxd4!
    • 1.Qxe4?
      • threat
        • 2.Bf7#
        • 2.Qd5#
        • 2.Qe6#
      • 1...Rxe4
        • 2.Bf7#
      • 1...Sb4
        • 2.Se5#
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...Se5
        • 2.Rxd4#
        • 2.Qd5#
        • 2.Qxd4#
      • 1...Se7
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...Sd8
        • 2.Rxd4#
        • 2.Qd5#
        • 2.Qxd4#
      • 1...Sg5
        • 2.Qd5#
      • 1...Sf8
        • 2.Qd5#
      • 1...Sf6!
  • Keys
    • 1.Sxe4!
      • threat
        • 2.Sd6#
      • 1...Kxd3
        • 2.Sd2#
      • 1...Rxe4
        • 2.Bf7#
      • 1...Rd6
        • 2.Sd2#
        • 2.Sxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(f);N_GUARD,SBLOCK::S(C)
  • Tries
    • Try
      • R(H);CHECK,XR(d)
      • Vars
        • K(c);P-FLIGHT,P_SPINP(e),S_CUTS(f),XR(H)::QAR1(B),XP(e)
      • Refutation
        • S(f);XR(H)
    • Try
      • Q(B);P_PINR(d),XP(e)
      • Threat
        • DUALS(3)
      • Vars
        • R(d);XQ(B)::B(G)
        • S(g);::QAB1(B)
      • Refutation
        • S(g);
  • Actual
    • S(E);XP(e)
    • Threat
      • S(E)
    • Vars
      • K(c);P_SPINR(d),S_CUTP(b),S_FLIGHT,XS(C)::B(G)+S(E)
      • R(d);N_GUARD,P_SPINR(d),XS(E)::B(G)
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