MESON Chess Problem Database

Problem Display
PID: 151681 (7B/1r3p1b/5N2/n1P1krp1/1NRpp3/1R3p1B/8/2Q2K2 w - - 0 1)

Nield, Joshua

The Referee, 1927

(First published on Sun Nov 6 1927)

7B/1r3p1b/5N2/n1P1krp1/1NRpp3/1R3p1B/8/2Q2K2

#2

9 + 10

15239 Valois Notebooks 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Sd7#
    • 1...d3
      • 2.Rxe4#
  • Tries
    • 1.Re3?
      • threat
        • 2.Rxe4#
      • 1...Kf4
        • 2.Sh5#
      • 1...Ke6
        • 2.Rxe4#
      • 1...dxe3
        • 2.Rxe4#
      • 1...Rf4
        • 2.Sd3#
        • 2.Sd7#
      • 1...Rxf6!
    • 1.Rxd4?
      • threat
        • 2.Rxe4#
      • 1...Kxd4
        • 2.Qc3#
      • 1...Ke6
        • 2.Rxe4#
      • 1...Rxf6
        • 2.Rd5#
      • 1...Rf4
        • 2.Sd7#
        • 2.Rd5#
      • 1...e3
        • 2.Re4#
        • 2.Qxe3#
      • 1...Rxb4!
    • 1.Qe3?
      • threat
        • 2.Qxe4#
      • 1...Ke6
        • 2.Qxe4#
      • 1...dxe3
        • 2.Rxe4#
      • 1...Rf4
        • 2.Sd3#
        • 2.Sd7#
        • 2.Qxd4#
      • 1...Rxf6!
    • 1.Qf4+?
      • 1...Kxf4
        • 2.Sh5#
      • 1...Ke6
        • 2.Qd6#
        • 2.Qxe4#
      • 1...Rxf4
        • 2.Sd7#
      • 1...gxf4!
    • 1.Qb1?
      • threat
        • 2.Qxe4#
      • 1...Kf4
        • 2.Sh5#
      • 1...Ke6
        • 2.Qxe4#
      • 1...Rf4
        • 2.Sd7#
      • 1...d3
        • 2.Rxe4#
      • 1...e3
        • 2.Qe4#
      • 1...Rxf6!
    • 1.Qe1?
      • threat
        • 2.Qxe4#
      • 1...Kf4
        • 2.Sh5#
      • 1...Ke6
        • 2.Qxe4#
      • 1...Rxf6
        • 2.Qg3#
      • 1...Rf4
        • 2.Sd3#
        • 2.Sd7#
      • 1...e3!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Qxe4#
      • 1...Kf4
        • 2.Sh5#
        • 2.Qh2#
      • 1...Ke6
        • 2.Qxe4#
      • 1...Rxf6
        • 2.Qh2#
      • 1...Rf4
        • 2.Sd7#
      • 1...d3
        • 2.Rxe4#
      • 1...e3
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(f);::B(I)+S(H),DCHECK
    • P(b);OGATE::R1(F),XP(c)
  • Tries
    • Try
      • R(C);P_PINP(c)
      • Threat
        • R1(C),XP(c)
      • Vars
        • K(e);N_SPINP(c),S_FLIGHT::S(H)
        • K(e);P-FLIGHT,P_SPINR(f)::R(C),XP(c)
        • P(b);N_SPINP(c),OGATE,XR(C)::R1(F),XP(c)
      • Refutation
        • R(f);P_SPINR(f),XS(H)
    • Try
      • R(F);XP(b)
      • Threat
        • R1(F),XP(c)
      • Vars
        • K(e);OGATEB,S_FLIGHT,XR(F)::QAB1(A)
        • K(e);P-FLIGHT,P_SPINR(f)::R(F),XP(c)
        • R(f);P_SPINR(f),XS(H)::R1(F)
      • Refutation
        • R(h);XS(E)
    • Try
      • Q(A);P_PINP(c)
      • Threat
        • QAR1(A),XP(c)
      • Vars
        • K(e);P-FLIGHT,P_SPINR(f)::QAR2(A),XP(c)
        • P(b);N_SPINP(c),OGATE,XQ(A)::R1(F),XP(c)
      • Refutation
        • R(f);P_SPINR(f),XS(H)
    • Try
      • Q(A);CHECK
      • Vars
        • K(e);S_FLIGHT,XQ(A)::S(H)
        • R(f);SBLOCK,XQ(A)::B(I)+S(H),DCHECK
      • Refutation
        • P(g);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(c)
      • Vars
        • K(e);S_FLIGHT::S(H)
        • K(e);P-FLIGHT,P_SPINR(f)::QAR2(A),XP(c)
        • R(f);SBLOCK::B(I)+S(H),DCHECK
        • P(b);OGATE::R1(F),XP(c)
        • P(c);::QAR1(A)
      • Refutation
        • R(f);P_SPINR(f),XS(H)
    • Try
      • Q(A);P_PINP(c)
      • Threat
        • QAR1(A),XP(c)
      • Vars
        • K(e);N_SPINP(c),S_FLIGHT::S(H)
        • K(e);P-FLIGHT,P_SPINR(f)::QAR2(A),XP(c)
        • R(f);N_GUARD,P_SPINR(f),XS(H)::QAB(A)
      • Refutation
        • P(c);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XP(c)
    • Vars
      • K(e);P-FLIGHT,P_SPINR(f)::QAR2(A),XP(c)
      • R(f);N_GUARD,P_SPINR(f),XS(H)::QAB(A)
      • R(f);SBLOCK::B(I)+S(H),DCHECK
      • P(b);OGATE::R1(F),XP(c)
      • P(c);::QAR1(A)
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