MESON Chess Problem Database

Problem Display
PID: 272704 (4R3/1q1p2bN/1r2p2p/1nP1k2P/7Q/7B/p4N2/K2R3n w - - 0 1)

Leppington, WG

Sunday Referee, 1934

(First published on Sun Dec 23 1934)

4R3/1q1p2bN/1r2p2p/1nP1k2P/7Q/7B/p4N2/K2R3n

#2

9 + 10

15239 Valois Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Qxe4#
    • 1...Qa6
      • 2.Qe4#
    • 1...Qc8
      • 2.Qe4#
    • 1...Qa7
      • 2.Qe4#
    • 1...Qc7
      • 2.Qe4#
    • 1...Qb8
      • 2.Qe4#
    • 1...Rc6
      • 2.Qe4#
    • 1...Bf6
      • 2.Qxf6#
    • 1...Bf8
      • 2.Qf6#
    • 1...Sg3
      • 2.Qxg3#
    • 1...Sa3
      • 2.Qd4#
    • 1...Sc3
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
    • 1...Sd6
      • 2.Qd4#
    • 1...Sa7
      • 2.Qd4#
    • 1...Sc7
      • 2.Qd4#
    • 1...d5
      • 2.Sd3#
      • 2.Re1#
    • 1...d6
      • 2.Rxe6#
  • Tries
    • 1.Sf8?
      • threat
        • 2.Sg6#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Qg2
        • 2.Sxd7#
      • 1...Qe4
        • 2.Sxd7#
      • 1...Bxf8!
    • 1.Re1+?
      • 1...Qe4
        • 2.Qxe4#
      • 1...Kd5+!
    • 1.Rf8?
      • threat
        • 2.Qf4#
      • 1...Bxf8
        • 2.Qf6#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Bf6
        • 2.Qxf6#
      • 1...Qf3!
    • 1.Qg4?
      • threat
        • 2.Qf5#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sd6
        • 2.Qd4#
      • 1...Qf3!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Sf7#
      • 1...Kf6
        • 2.Qf4#
      • 1...hxg5
        • 2.Qxg5#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Qf3
        • 2.Sxf3#
      • 1...Sd6
        • 2.Qd4#
      • 1...d5
        • 2.Sf3#
      • 1...d6
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 14
  • Sets
    • Q(h);N_GUARD::QAR1(E),XQ(h)
    • Q(h);N_GUARD::QAR1(E)
    • R(e);S_CUTQ(h)::QAR1(E)
    • B(j);N_GUARD::QAB1(E),XB(j)
    • B(j);N_GUARD::QAB1(E)
    • S(a);N_GUARD::QAB(E),XS(a)
    • S(c);N_GUARD::QAB1(E)
    • S(c);N_GUARD::QAB1(E),XS(c)
    • P(i);N_GUARD,S_CUTR(e)::R1(I),XP(f)
  • Tries
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • S(c);N_GUARD::QAB1(E),XS(c)
        • Q(h);N_GUARD::S(H),XP(i)
      • Refutation
        • B(j);XS(H)
    • Try
      • R(B);CHECK
      • Vars
        • Q(h);N_GUARD,P_SPINQ(h)::QAR1(E),XQ(h)
      • Refutation
        • K(d);CHECK,N_SPINP(f),P-FLIGHT
    • Try
      • R(I);N_PINP(f)
      • Threat
        • QAB1(E)
      • Vars
        • B(j);N_GUARD,XR(I)::QAB1(E)
        • S(c);N_GUARD::QAB1(E),XS(c)
        • Q(h);N_GUARD::QAR1(E),XQ(h)
        • B(j);N_GUARD::QAB1(E),XB(j)
      • Refutation
        • Q(h);
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • S(c);N_GUARD::QAB1(E),XS(c)
        • Q(h);N_GUARD::QAR1(E),XQ(h)
        • S(a);N_GUARD::QAB(E),XS(a)
        • S(c);N_GUARD::QAB1(E)
      • Refutation
        • Q(h);
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • K(d);N_GUARD,N_SPINP(f),S_FLIGHT::QAR2(E)
      • P(g);OGATE,XS(H)::QAR2(E),XP(g)
      • S(c);N_GUARD::QAB1(E),XS(c)
      • Q(h);N_GUARD::S(H),XQ(h)
      • S(c);N_GUARD::QAB1(E)
      • P(i);S_CUTQ(h)::S(H)
      • P(i);N_GUARD,S_CUTR(e)::R1(I),XP(f)
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