MESON Chess Problem Database

Problem Display
PID: 98879 (K7/8/1Np1p3/2k2n2/QpNRrB2/8/8/1n6 w - - 0 1)

Swane, Jan Arnold Willem

Problem (Zagreb), 1953

K7/8/1Np1p3/2k2n2/QpNRrB2/8/8/1n6

#2

6 + 7

6490 yacpdb 2009
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4
      • 2.Qa5#
    • 1...Sxd4
      • 2.Bd6#
  • Tries
    • 1.Be5?
      • threat
        • 2.Sd7#
        • 2.Qa5#
      • 1...Rxd4
        • 2.Qa5#
      • 1...Sxd4
        • 2.Bd6#
      • 1...Sa3
        • 2.Sd7#
      • 1...Sc3
        • 2.Sd7#
      • 1...Sd6
        • 2.Sd7#
      • 1...Rxe5!
    • 1.Qxb4+?
      • 1...Kxd4
        • 2.Sb2#
        • 2.Se5#
      • 1...Kxb4!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qxb4#
      • 1...Kxd4
        • 2.Qxb4#
      • 1...Kxb6
        • 2.Sd7#
      • 1...Rxd4
        • 2.Qxc6#
      • 1...Sxd4
        • 2.Sed7#
      • 1...b3
        • 2.Sed7#
        • 2.Sbd7#
        • 2.Qb4#

This anticipates 57806(2000)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK,XR(C)::QAR2(A)
    • S(e);N_GUARD,SBLOCK,XR(C)::B(D)
  • Tries
    • Try
      • B(D);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);XR(C)::QAR2(A)
        • S(e);N_GUARD,SBLOCK,XR(C)::B(D)
        • S(a);::S(E)
        • S(e);::S(E)
      • Refutation
        • R(c);XB(D)
    • Try
      • Q(A);CHECK,XP(b)
      • Refutation
        • K(d);S_FLIGHT,XQ(A)
  • Actual
    • S(B);
    • Threat
      • QAB1(A),XP(b)
    • Vars
      • K(d);P_SPINP(b),S_FLIGHT,XR(C)::QAR2(A),XP(b)
      • K(d);S_FLIGHT,XS(E)::S(B)
      • R(c);SBLOCK,XR(C)::QAR1(A),XP(f)
      • S(e);SBLOCK,XR(C)::S(B)
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