MESON Chess Problem Database

Problem Display
PID: 79512 (3R2Q1/bPP1NR2/b6p/r4N1p/pr2k2K/3ppp2/1n5B/5B2 w - - 0 1)

Nietvelt, Gustaaf Josephus

1st Prize, British Chess Magazine, 1923

3R2Q1/bPP1NR2/b6p/r4N1p/pr2k2K/3ppp2/1n5B/5B2

#2

10 + 12

5110 Bekroonde Problemen 2002
133 The Problemist Supplement 2008
5454 Near Snap 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Rb6
      • 2.Rd4#
    • 1...Re5
      • 2.Sg3#
    • 1...Bd4
      • 2.Sd6#
    • 1...Sc4
      • 2.Bxd3#
    • 1...f2
      • 2.Bg2#
      • 2.Qg2#
  • Tries
    • 1.Rd4+?
      • 1...Bxd4
        • 2.Sd6#
      • 1...Rxd4!
    • 1.Qg5?
      • threat
        • 2.Sg3#
        • 2.Qf4#
      • 1...Rxf5
        • 2.Qxf5#
      • 1...Rd5
        • 2.Qf4#
      • 1...hxg5+!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Sd5#
      • 1...Rxf5
        • 2.Sxf5#
      • 1...f2
        • 2.Bg2#
      • 1...Rb6
        • 2.Rd4#
      • 1...Rd5
        • 2.Sxd5#
      • 1...Re5
        • 2.Sg3#
      • 1...Bb5
        • 2.Sc6#
      • 1...Bd4
        • 2.Sd6#
      • 1...Bc5
        • 2.Qc6#
      • 1...Sc4
        • 2.Bxd3#

This anticipates 60164(1930)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(f);N_GUARD,S_CUTB(l)::R1(I)
    • R(h);SBLOCK::S(D)
    • B(l);SBLOCK::S(D)
    • S(a);N_GUARD,S_CUTB(j)::B(A),XP(b)
  • Tries
    • Try
      • R(I);CHECK
      • Vars
        • B(l);SBLOCK,XR(I)::S(D)
      • Refutation
        • R(f);XR(I)
    • Try
      • Q(J);
      • Threat
        • DUALS(2)
      • Vars
        • R(h);OGATE,XS(D)::QAB1(J),XR(h)
        • R(h);::QAR1(J)
      • Refutation
        • P(k);CHECK,XQ(J)
  • Actual
    • Q(J);
    • Threat
      • QAR(J)+S(G)
    • Vars
      • R(h);XS(D)::QAR(J)+S(G),XR(h)
      • P(d);OGATEB::B(A)
      • R(f);N_GUARD,S_CUTB(l)::R1(I)
      • R(h);::QAR(J)+S(G),XR(h)
      • R(h);SBLOCK::S(D)
      • B(j);S_CUTR(h)::QAR(J)+S(G)
      • B(l);SBLOCK::S(D)
      • B(l);S_CUTR(h)::QAB(J)
      • S(a);N_GUARD,S_CUTB(j)::B(A),XP(b)
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