MESON Chess Problem Database

Problem Display
PID: 176381 (B2r4/8/1B5p/3PP2K/1QNNk3/R2pppP1/5n2/8 w - - 0 1)

Haring, Jacobus

Schach-Echo, 1978

B2r4/8/1B5p/3PP2K/1QNNk3/R2pppP1/5n2/8

#2

10 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...d2
      • 2.Rxe3#
  • Tries
    • 1.Sd2+?
      • 1...Kxe5
        • 2.Qe7#
      • 1...exd2!
    • 1.Sxe3?
      • threat
        • 2.Sc6#
      • 1...Kxe3
        • 2.Qe1#
      • 1...Kxe5
        • 2.Qe7#
      • 1...Rxd5!
    • 1.Qf8?
      • threat
        • 2.Qxf3#
        • 2.Qf4#
        • 2.Qf5#
      • 1...Rxa8
        • 2.Qxf3#
      • 1...Sh3
        • 2.Qxf3#
        • 2.Qf5#
      • 1...Rxf8!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Sxe3#
      • 1...Kxd5
        • 2.Sxd8#
      • 1...Kf5
        • 2.Sxe3#
      • 1...Rxd5
        • 2.Sd6#
      • 1...e2
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(b);OGATE::R1(A),XP(c)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(e);P-FLIGHT,XP(G)::QAR2(C)
      • Refutation
        • P(c);XS(D)
    • Try
      • S(D);XP(c)
      • Threat
        • QAR(C)+S(E)
      • Vars
        • K(e);OGATEB,P-FLIGHT,P_SPINP(b),XS(D)::QAR2(C)
        • K(e);OGATEB,P-FLIGHT,XP(G)::QAR2(C)
      • Refutation
        • R(g);P_PINP(G),P_SPINR(g),XP(F)
    • Try
      • Q(C);
      • Threat
        • DUALS(3)
      • Vars
        • R(g);XB(J)::QAB1(C),XP(d)
      • Refutation
        • R(g);XQ(C)
  • Actual
    • S(E);
    • Threat
      • QAR(C)+S(D),XP(c)
    • Vars
      • K(e);S_FLIGHT,XP(F)::B(J)+S(E),XR(g)
      • K(e);S_FLIGHT::S(D),XP(c)
      • R(g);P_PINP(G),SBLOCK,XP(F)::QAR(C)+S(D),DCHECK
      • P(c);::QAR(C)+S(D)
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