MESON Chess Problem Database

Problem Display
PID: 172174 (3r4/2Q5/8/1pnNpP1p/3k2bR/1rNP4/1R3P1K/BB6 w - - 0 1)

ten Cate, Pieter

Parallele 50, 1949

3r4/2Q5/8/1pnNpP1p/3k2bR/1rNP4/1R3P1K/BB6

#2

11 + 8

133 The Problemist Supplement 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Rb4#
    • 1...Rb4
      • 2.Rxb4#
    • 1...Rxd5
      • 2.Se2#
    • 1...e4
      • 2.Qg7#
  • Tries
    • 1.Se3?
      • threat
        • 2.Se2#
      • 1...Kxc3
        • 2.Qxc5#
      • 1...Rxc3
        • 2.Rb4#
      • 1...Sxd3
        • 2.Sc2#
      • 1...e4
        • 2.Qg7#
      • 1...Se4!
    • 1.Sb4?
      • threat
        • 2.Se2#
        • 2.Sxb5#
      • 1...Kxc3
        • 2.Qxc5#
      • 1...Rxb4
        • 2.Rxb4#
      • 1...Sxd3
        • 2.Sc2#
      • 1...Rb8
        • 2.Se2#
      • 1...Se4
        • 2.Sxb5#
      • 1...e4
        • 2.Sxb5#
        • 2.Qg7#
      • 1...Rxc3!
    • 1.Rxg4+?
      • 1...Se4
        • 2.Rxe4#
        • 2.Qb6#
        • 2.Qa7#
      • 1...e4
        • 2.Qg7#
      • 1...hxg4!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Sfe2#
      • 1...Kxc3
        • 2.Qxc5#
      • 1...Rxb2
        • 2.Sxb5#
      • 1...Rxc3
        • 2.Rb4#
      • 1...exf4
        • 2.Qg7#
      • 1...Be2
        • 2.Scxe2#
        • 2.Sfxe2#
      • 1...Se4
        • 2.Se6#
      • 1...e4
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • R(a);OGATE::R(C)
    • R(a);OGATE::R(C),XR(a)
    • R(h);SBLOCK,XS(I)::S(F)
    • P(f);N_SPINB(c),OGATEB::QAB(K)
  • Tries
    • Try
      • S(I);
      • Threat
        • S(F)
      • Vars
        • K(b);N_SPINB(c),P_SPINS(e),S_FLIGHT,XS(F)::QAR2(K),XS(e)
        • R(a);OGATE,XS(F)::R(C)
        • S(e);SBLOCK,XP(G)::S(I)
        • P(f);N_SPINB(c),OGATEB::QAB(K)
      • Refutation
        • S(e);N_SPINB(c)
    • Try
      • S(I);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);N_SPINB(c),P_SPINS(e),S_FLIGHT,XS(F)::QAR2(K),XS(e)
        • R(a);OGATE,XS(I)::R(C),XR(a)
        • S(e);SBLOCK,XP(G)::S(I)
        • R(h);::S(F)
        • S(e);N_SPINB(c)::S(F),XP(d)
      • Refutation
        • R(a);XS(F)
    • Try
      • R(H);CHECK,XB(c)
      • Vars
        • P(f);P_SPINP(f),S_CUTP(g),S_CUTS(e)::QAB(K)
      • Refutation
        • P(g);XR(H)
  • Actual
    • S(I);N_PINB(c)
    • Threat
      • S(I)
    • Vars
      • K(b);P_SPINS(e),S_FLIGHT,XS(F)::QAR2(K),XS(e)
      • R(a);N_GUARD,P_PINP(D),XR(C)::S(F),XP(d)
      • R(a);OGATE,XS(F)::R(C)
      • P(f);OGATEB,XS(I)::QAB(K)
      • S(e);N_GUARD::S(I)
      • P(f);OGATEB::QAB(K)
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