MESON Chess Problem Database

Problem Display
PID: 9416 (q2R4/1bb3B1/3p4/pBP2Q1p/r1NPN3/pPpk3n/5R1K/4r1n1 w - - 0 1)

Mackenzie, Arthur Ford

Sp. Prize, Sydney Morning Herald, 1902-1903

q2R4/1bb3B1/3p4/pBP2Q1p/r1NPN3/pPpk3n/5R1K/4r1n1

#2

11 + 13

2794 Terms & Themes of Chess Problems 1907
5424 Versunkene Schatze 1998

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.Sb2#
    • 1...c2
      • 2.Rd2#
  • Tries
    • 1.Sxa3+?
      • 1...Ke3
        • 2.Sc2#
      • 1...Rc4!
    • 1.Se5+?
      • 1...Kxd4
        • 2.Sg4#
      • 1...Ke3!
    • 1.Qf3+?
      • 1...Re3
        • 2.Sb2#
        • 2.Qxe3#
      • 1...Sxf3+!
  • Keys
    • 1.Re2!
      • threat
        • 2.Sb2#
      • 1...Rxe2+
        • 2.Sf2#
      • 1...Sf3+
        • 2.Qxf3#
      • 1...dxc5+
        • 2.Se5#
      • 1...d5+
        • 2.Sg3#
      • 1...Kxe2
        • 2.Sxc3#
      • 1...Rxc4
        • 2.Bxc4#
      • 1...Sxe2
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • R(a);SBLOCK::B(G)+S(D),DCHECK
    • P(d);N_GUARD::R1(A)
  • Tries
    • Try
      • S(D);CHECK,XP(c)
      • Vars
        • K(e);P-FLIGHT::S(D)
      • Refutation
        • R(g);P_SPINR(g)
    • Try
      • S(D);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINP(j),XP(E)::B(J)+S(D)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(I);CHECK
      • Refutation
        • S(b);CHECK,XQ(I)
  • Actual
    • R(A);
    • Threat
      • B(G)+S(D),DCHECK
    • Vars
      • R(a);CHECK,SBLOCK,XR(A)::QAB(I)+S(F),DCHECK
      • S(b);CHECK,N_GUARD::QAR2(I),XS(b)
      • P(j);CHECK,XP(H)::B(G)+S(D),DCHECK
      • P(j);CHECK,S_CUTB(k)::QAB(I)+S(F)
      • K(e);S_FLIGHT,XR(A)::S(F),XP(d)
      • R(g);OGATE,P_SPINR(g),XS(D)::B(G),XR(g)
      • S(b);SBLOCK,XR(A)::QAB(I)+S(F),DCHECK
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