MESON Chess Problem Database

Problem Display
PID: 245849 (6n1/3Q1r2/B1Pnrp2/6p1/4p3/1pP1k2b/4NRP1/4K3 w - - 0 1)

Beck, Friedrich

Europa-Rochade, 1985

6n1/3Q1r2/B1Pnrp2/6p1/4p3/1pP1k2b/4NRP1/4K3

#2

8 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Qxh3#
    • 1...Ree7
      • 2.Qxh3#
    • 1...Re8
      • 2.Qxh3#
    • 1...Rf8
      • 2.Qa7#
    • 1...Sc4
      • 2.Qd4#
    • 1...Sb5
      • 2.Qd2#
    • 1...Sf5
      • 2.Qd2#
    • 1...Sb7
      • 2.Qd2#
      • 2.Qd4#
    • 1...Sc8
      • 2.Qd2#
      • 2.Qd4#
    • 1...Se8
      • 2.Qd2#
      • 2.Qd4#
    • 1...Se7
      • 2.Qa7#
  • Tries
    • 1.Qxd6?
      • threat
        • 2.Qg3#
        • 2.Qc5#
        • 2.Qd2#
        • 2.Qd4#
      • 1...Bxg2
        • 2.Qc5#
        • 2.Qd2#
        • 2.Qd4#
      • 1...Re5
        • 2.Qd2#
        • 2.Qd4#
      • 1...Rd7
        • 2.Qg3#
      • 1...Bg4
        • 2.Qc5#
        • 2.Qd2#
        • 2.Qd4#
      • 1...Rxd6!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Sd5#
      • 1...gxf4
        • 2.Re2#
      • 1...Re5
        • 2.Qxh3#
      • 1...Sc4
        • 2.Qd4#
      • 1...Sb5
        • 2.Qd2#
      • 1...Se7
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • R(g);OGATE::QAR(H),XB(c)
    • R(i);N_GUARD::QAB(H)
    • S(f);OGATE::QAB1(H)
    • S(j);S_CUTR(i)::QAB(H)
  • Tries
    • Try
      • Q(H);XS(f)
      • Threat
        • DUALS(4)
      • Vars
        • R(i);::QAR2(H)
      • Refutation
        • R(g);XQ(H)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • P(e);SBLOCK,XS(B)::R1(C)
      • R(g);OGATE::QAR(H),XB(c)
      • S(f);OGATE::QAB1(H)
      • S(j);S_CUTR(i)::QAB(H)
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