MESON Chess Problem Database

Problem Display
PID: 6746 (b7/2N1pnB1/1K2pr2/3P4/R1Nkp3/4R2Q/1P2n3/2b5 w - - 0 1)

Schor, Laszlo

1st HM., Grantham Journal, 1933

b7/2N1pnB1/1K2pr2/3P4/R1Nkp3/4R2Q/1P2n3/2b5

#2

9 + 9

3147 Chess Problems: Introduction to an Art 1963
3098 FIDE Album (1914-1944) (I) 1971
5454 Near Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe3
      • 2.Qxe3#
    • 1...Bxd5
      • 2.Sb5#
    • 1...Sc3
      • 2.bxc3#
    • 1...exd5+
      • 2.Se6#
    • 1...e5+
      • 2.Sd6#
  • Tries
    • 1.Bxf6+?
      • 1...Se5
        • 2.Sd2#
        • 2.Sa3#
        • 2.Sa5#
        • 2.Sxe5#
        • 2.Sd6#
        • 2.Bxe5#
      • 1...e5
        • 2.Sd2#
        • 2.Sa3#
        • 2.Sa5#
        • 2.Sxe5#
        • 2.Sd6#
      • 1...exf6!
    • 1.Rxe2?
      • threat
        • 2.Qc3#
      • 1...exd5+
        • 2.Se6#
      • 1...e5+
        • 2.Sd6#
      • 1...Bxb2
        • 2.Rd2#
        • 2.Qe3#
      • 1...Be3
        • 2.Qxe3#
      • 1...Bd2
        • 2.Rxd2#
      • 1...e3!
  • Keys
    • 1.Qxe6!
      • threat
        • 2.Sb5#
      • 1...Bxe3
        • 2.Se5#
      • 1...Bc6
        • 2.Qxe4#
      • 1...Sc3
        • 2.bxc3#
      • 1...Sd6
        • 2.Qe5#

This anticipates 140947(1995)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(a);OGATE,XR(B)::QAB1(C),XB(a)
    • B(i);SBLOCK,XP(F)::S(H)
    • S(b);OGATE::P(A),XS(b)
    • P(e);CHECK,SBLOCK,XP(F)::S(H)
    • P(e);CHECK,N_SPINR(f),SBLOCK::R(D)+S(E)
  • Tries
    • Try
      • B(I);CHECK,XR(f)
      • Refutation
        • P(g);XB(I)
    • Try
      • R(B);XS(b)
      • Threat
        • QAB1(C)
      • Vars
        • P(e);CHECK,SBLOCK,XP(F)::S(H)
        • P(e);CHECK,N_SPINR(f),SBLOCK::R(D)+S(E)
        • B(a);N_GUARD::QAB1(C),XB(a)
        • B(a);N_GUARD::R(B),XB(a)
      • Refutation
        • P(d);
  • Actual
    • Q(C);P_SPINQ(C),XP(e)
    • Threat
      • S(H)
    • Vars
      • B(a);SBLOCK,XR(B)::R(D)+S(E)
      • B(i);N_PINQ(C)::QAR1(C),XP(d)
      • S(b);OGATE::P(A),XS(b)
      • S(h);N_PINQ(C)::QAB1(C)
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