MESON Chess Problem Database

Problem Display
PID: 235215 (3Q4/8/5p2/1B2NK2/1r1pp1PN/1p2k3/1RP2b2/3R2r1 w - - 0 1)

Heyl, Peter

Schach, 2003

3Q4/8/5p2/1B2NK2/1r1pp1PN/1p2k3/1RP2b2/3R2r1

#2

9 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Sg2#
    • 1...Rf1
      • 2.Sg2#
    • 1...Rh1
      • 2.Sg2#
    • 1...Rg2
      • 2.Sxg2#
    • 1...Rxg4
      • 2.Sxg4#
    • 1...fxe5
      • 2.Qg5#
  • Tries
    • 1.Rxb3+?
      • 1...Rxb3
        • 2.Qxd4#
      • 1...d3!
    • 1.cxb3?
      • threat
        • 2.Re2#
      • 1...Rxb5
        • 2.Qxd4#
      • 1...Re1
        • 2.Sg2#
      • 1...Rc4
        • 2.Sxc4#
      • 1...d3!
    • 1.c3?
      • threat
        • 2.Re2#
      • 1...Rxb5
        • 2.Qxd4#
      • 1...Re1
        • 2.Sg2#
      • 1...Rc4
        • 2.Sxc4#
      • 1...d3!
  • Keys
    • 1.c4!
      • threat
        • 2.Qxd4#
      • 1...Rxd1
        • 2.Sg2#
      • 1...Rxc4
        • 2.Sxc4#
      • 1...fxe5
        • 2.Qg5#
      • 1...dxc4 ep
        • 2.Re2#
      • 1...d3
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • R(a);N_GUARD::S(E)
    • R(a);N_GUARD::S(E),XR(a)
    • R(a);XP(D)::S(G),XR(a)
    • P(h);OGATE,XS(G)::QAB(I)
  • Tries
    • Try
      • R(B);CHECK,XP(c)
      • Vars
        • R(e);XR(B)::QAB1(I),XP(f)
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • P(C);XP(c)
      • Threat
        • R1(B)
      • Vars
        • R(e);N_GUARD,P_PINS(G),XB(F)::QAB1(I),XP(f)
        • R(a);N_GUARD::S(E)
        • R(e);N_GUARD::S(G),XR(e)
      • Refutation
        • P(f);
    • Try
      • P(C);
      • Threat
        • R1(B)
      • Vars
        • R(e);N_GUARD,P_PINS(G),XB(F)::QAB1(I),XP(f)
        • R(a);N_GUARD::S(E)
        • R(e);N_GUARD::S(G),XR(e)
      • Refutation
        • P(f);
  • Actual
    • P(C);
    • Threat
      • QAB1(I),XP(f)
    • Vars
      • R(a);N_GUARD,XR(A)::S(E)
      • R(e);XP(C)::S(G),XR(e)
      • P(h);OGATE,XS(G)::QAB(I)
      • P(f);EP,XP(C)::R1(B)
      • P(f);OGATEB::QAB(I)
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