MESON Chess Problem Database

Problem Display
PID: 197091 (5n2/4R3/5pr1/1P1kP3/3PN2r/NR6/PB1p1bnp/1B1Q3K w - - 0 1)

Shire, David J

The Problemist, 2018

5n2/4R3/5pr1/1P1kP3/3PN2r/NR6/PB1p1bnp/1B1Q3K

#2

12 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rg3
      • 2.Sxf6#
    • 1...Rg4
      • 2.Sxf6#
    • 1...Rg5
      • 2.Sxf6#
    • 1...Rg7
      • 2.Sxf6#
    • 1...Rg8
      • 2.Sxf6#
    • 1...Se6
      • 2.Rd7#
    • 1...fxe5
      • 2.Rxe5#
  • Tries
    • 1.Rc3?
      • threat
        • 2.Rc5#
      • 1...Kxd4
        • 2.Qxd2#
      • 1...Bxd4
        • 2.Qb3#
      • 1...Se6
        • 2.Rd7#
      • 1...Sd7!
    • 1.Rg3?
      • threat
        • 2.Qb3#
      • 1...Rxg3
        • 2.Sxf6#
      • 1...Se3!
    • 1.Rb4?
      • threat
        • 2.Sc3#
        • 2.Qb3#
      • 1...Rxe4
        • 2.Qb3#
      • 1...Bxd4
        • 2.Rxd4#
        • 2.Qb3#
      • 1...fxe5
        • 2.Rxe5#
        • 2.Qb3#
      • 1...Se3
        • 2.Sc3#
      • 1...Rg3
        • 2.Sxf6#
      • 1...Rh3!
    • 1.Rd7+?
      • 1...Ke6
        • 2.Sc5#
      • 1...Sxd7!
  • Keys
    • 1.Rd3!
      • threat
        • 2.Sc3#
      • 1...Kxe4
        • 2.Qf3#
      • 1...Rxe4
        • 2.Qb3#
      • 1...Bxd4
        • 2.Rxd4#
      • 1...fxe5
        • 2.Rxe5#

This is a version of 183518

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • R(h);N_GUARD::S(I),XP(g)
    • S(i);N_GUARD,SBLOCK::R(L)
    • P(g);OGATE,XP(K)::R1(L),XP(g)
  • Tries
    • Try
      • R(G);
      • Threat
        • R1(G)
      • Vars
        • K(f);OGATEB,P-FLIGHT,P_SPINP(a),XP(H)::QAR2(B),XP(a)
        • B(b);SBLOCK,XP(H)::QAB(B)
        • S(i);N_GUARD,SBLOCK::R(L)
      • Refutation
        • S(i);
    • Try
      • R(G);
      • Threat
        • QAB(B)
      • Vars
        • R(h);N_GUARD,XR(G)::S(I),XP(g)
      • Refutation
        • S(c);
    • Try
      • R(G);
      • Threat
        • DUALS(2)
      • Vars
        • R(e);XS(I)::QAB(B)
        • S(c);::S(I)
        • R(h);N_GUARD::S(I),XP(g)
      • Refutation
        • R(e);
    • Try
      • R(L);CHECK
      • Vars
        • K(f);S_FLIGHT::S(I)
      • Refutation
        • S(i);XR(L)
  • Actual
    • R(G);
    • Threat
      • S(I)
    • Vars
      • K(f);OGATEB,S_FLIGHT,XS(I)::QAB1(B)
      • R(e);SBLOCK,XS(I)::QAB(B)
      • B(b);OGATE,P_SPINB(b),XP(H)::R1(G),XB(b)
      • P(g);OGATE,XP(K)::R1(L),XP(g)
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