MESON Chess Problem Database

Problem Display
PID: 148270 (2B5/6p1/1pr2RPb/r3k2p/1Nnp1R1B/pQ1P2P1/1n3N2/2K5 w - - 0 1)

Goldstein, Alexander

3rd Place, Match: Denmark - Poland, 1933

2B5/6p1/1pr2RPb/r3k2p/1Nnp1R1B/pQ1P2P1/1n3N2/2K5

#2

11 + 11

5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Sxc6#
    • 1...Rc5
      • 2.Re6#
    • 1...Rd6
      • 2.Rf5#
    • 1...Re6
      • 2.Rxe6#
    • 1...Rc7
      • 2.Re6#
    • 1...Bxf4+
      • 2.gxf4#
    • 1...Sxd3+
      • 2.Sfxd3#
    • 1...Sd2+
      • 2.Sxc6#
    • 1...Se3+
      • 2.Sxc6#
    • 1...Sd6+
      • 2.Sxc6#
  • Tries
    • 1.Rxc6?
      • threat
        • 2.Re6#
      • 1...Sxd3+
        • 2.Sfxd3#
      • 1...Sd6
        • 2.Qe6#
      • 1...Bxf4+!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qxd4#
      • 1...Bxf4+
        • 2.gxf4#
      • 1...Sxd3+
        • 2.Sfxd3#
      • 1...dxc3
        • 2.d4#
      • 1...Rd5
        • 2.Sxc6#
      • 1...Rd6
        • 2.Rf5#
      • 1...Sd2
        • 2.R4f5#
      • 1...Se3
        • 2.Re4#
      • 1...Sd6
        • 2.Re6#

This anticipates 96883(1945)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(e);SBLOCK::S(F),XR(i)
    • R(i);N_GUARD::R1(I)
    • R(i);SBLOCK::R1(I)
    • R(i);N_GUARD::R1(I),XR(i)
    • B(j);CHECK,OGATE,XR(G)::P(E),XB(j)
    • S(a);CHECK,XP(D)::S(B),XS(a)
    • S(c);CHECK,N_PINR(G)::S(F),XR(i)
    • S(c);CHECK::S(F),XR(i)
  • Tries
    • Try
      • R(I);XR(i)
      • Threat
        • R1(I)
      • Vars
        • S(a);CHECK,XP(D)::S(B),XS(a)
        • S(c);OGATE::QAR1(C)
      • Refutation
        • B(j);CHECK,XR(G)
  • Actual
    • Q(C);P_PINP(d)
    • Threat
      • QAB1(C),XP(d)
    • Vars
      • B(j);CHECK,OGATE,XR(G)::P(E),XB(j)
      • S(a);CHECK,XP(D)::S(B),XS(a)
      • P(d);N_SPINP(d),OGATE,XQ(C)::P(D)
      • R(e);SBLOCK::S(F),XR(i)
      • R(i);SBLOCK::R1(I)
      • S(c);N_PINR(G),P_PINQ(C)::R1(G)
      • S(c);P_PINQ(C),S_CUTR(i)::R1(I)
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