MESON Chess Problem Database

Problem Display
PID: 239602 (3n3B/1pP5/2pp1N2/2R1r3/2pkp1pR/Q7/1KP2b2/2N3n1 w - - 0 1)

Maleika, Gerhard

4th Prize, Europa-Rochade, 1986

3n3B/1pP5/2pp1N2/2R1r3/2pkp1pR/Q7/1KP2b2/2N3n1

#2

9 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc5
      • 2.Qc3#
    • 1...Rd5
      • 2.Sxd5#
    • 1...Rh5
      • 2.Sxh5#
    • 1...Re8
      • 2.Sxe8#
    • 1...Be3
      • 2.c3#
    • 1...Se2
      • 2.Sxe2#
    • 1...Sf3
      • 2.Se2#
    • 1...Sh3
      • 2.Se2#
    • 1...c3+
      • 2.Qxc3#
    • 1...e3
      • 2.c3#
    • 1...dxc5
      • 2.Qc3#
  • Tries
    • 1.Sd7?
      • threat
        • 2.Qc3#
      • 1...c3+
        • 2.Qxc3#
      • 1...dxc5
        • 2.Qxc5#
      • 1...e3
        • 2.Rxg4#
      • 1...Se2
        • 2.Sxe2#
      • 1...Be1!
  • Keys
    • 1.Sxg4!
      • threat
        • 2.c3#
      • 1...c3+
        • 2.Qxc3#
      • 1...dxc5
        • 2.cxd8Q#
        • 2.cxd8R#
      • 1...e3
        • 2.Sxf2#
      • 1...Be1
        • 2.Qe3#
      • 1...Se2
        • 2.Sxe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • R(g);SBLOCK,XR(F)::QAB1(D)
    • R(g);::B(I)+S(G),XR(g)
    • B(b);SBLOCK::P(C)
    • S(a);N_GUARD::S(A),XS(a)
    • S(a);N_GUARD::S(A)
    • P(c);CHECK::QAB1(D),XP(c)
    • P(e);P_SPINP(f),SBLOCK::P(C)
    • P(i);SBLOCK,XR(F)::QAB1(D)
  • Tries
    • Try
      • S(G);P_PINR(g)
      • Threat
        • QAB1(D)
      • Vars
        • P(c);CHECK::QAB1(D),XP(c)
        • P(i);OGATE,XR(F)::QAB1(D),XP(i)
        • P(e);OGATEB,P_SPINP(f)::R(E),XP(f)
        • S(a);N_GUARD::S(A),XS(a)
      • Refutation
        • B(b);
  • Actual
    • S(G);P_PINR(g),XP(f)
    • Threat
      • P(C)
    • Vars
      • P(c);CHECK::QAB1(D),XP(c)
      • P(i);XR(F)::PXS(k)=Q
      • P(e);::R(E)+S(G),XB(b)
      • B(b);N_GUARD::QAB1(D)
      • S(a);N_GUARD::S(A),XS(a)
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