MESON Chess Problem Database

Problem Display
PID: 264420 (3R1q2/2rB4/2R1nn2/1Npk1N2/3P1p2/2rQ1P2/1bP5/4K3 w - - 0 1)

Webb, G

Sunday Referee, 1935

(First published on Sun Oct 20 1935)

3R1q2/2rB4/2R1nn2/1Npk1N2/3P1p2/2rQ1P2/1bP5/4K3

#2

10 + 9

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.Rxd6#
    • 1...Qh6
      • 2.Se7#
      • 2.Rd6#
    • 1...Qe7
      • 2.Sxe7#
    • 1...Qg7
      • 2.Rd6#
    • 1...Qf7
      • 2.Rd6#
    • 1...Qxd8
      • 2.Rd6#
    • 1...Qe8
      • 2.Rd6#
    • 1...Qg8
      • 2.Se7#
      • 2.Rd6#
    • 1...Qh8
      • 2.Se7#
      • 2.Rd6#
    • 1...Ra3
      • 2.c4#
    • 1...Rb3
      • 2.c4#
    • 1...Bc1
      • 2.Sxc3#
    • 1...Ba3
      • 2.Sxc3#
    • 1...Sg5
      • 2.Sxc7#
    • 1...Sg7
      • 2.Sxc7#
    • 1...Sxd8
      • 2.Sxc7#
    • 1...Se4
      • 2.fxe4#
  • Tries
    • 1.Rxe6?
      • threat
        • 2.Sxc7#
        • 2.Re5#
      • 1...Qxd8
        • 2.Re5#
        • 2.Rd6#
      • 1...Rxd7
        • 2.Sc7#
      • 1...Sxd7
        • 2.Sxc7#
      • 1...cxd4
        • 2.Qxd4#
      • 1...Qd6
        • 2.Rxd6#
      • 1...Qe7
        • 2.Sxc7#
        • 2.Sxe7#
      • 1...Qe8
        • 2.Sxc7#
      • 1...Rc6
        • 2.Re5#
      • 1...Ra7
        • 2.Re5#
      • 1...Rb7
        • 2.Re5#
      • 1...Rc8
        • 2.Re5#
      • 1...Sg4
        • 2.Sxc7#
      • 1...Se8
        • 2.Re5#
      • 1...Rxd3!
    • 1.dxc5+?
      • 1...Ke5
        • 2.Rxe6#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Rxd3!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qxe6#
      • 1...Rxc6
        • 2.Bxe6#
      • 1...Sxd4
        • 2.Sxc7#
      • 1...Sxd8
        • 2.Sxc7#
      • 1...Qd6
        • 2.Rxd6#
      • 1...Qe7
        • 2.Sxe7#
      • 1...Qf7
        • 2.Rd6#
      • 1...Qe8
        • 2.Rd6#
      • 1...Qg8
        • 2.Se7#
        • 2.Rd6#
      • 1...Re3
        • 2.c4#
      • 1...Sg5
        • 2.Sxc7#
      • 1...Sg7
        • 2.Sxc7#
      • 1...Se4
        • 2.fxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • Q(i);N_GUARD::R1(H),XQ(i)
    • Q(i);N_GUARD::S(G),XQ(i)
    • Q(i);N_GUARD::R1(H)
    • Q(i);N_GUARD,XR(J)::R1(H)
    • R(b);OGATE::P(B)
    • B(a);N_GUARD::S(F),XR(b)
    • S(f);N_GUARD::S(F),XR(h)
    • S(f);N_GUARD,XR(J)::S(F),XR(h)
    • S(g);OGATE::P(D),XS(g)
  • Tries
    • Try
      • R(H);XS(f)
      • Threat
        • DUALS(2)
      • Vars
        • R(h);P_SPINR(h),XB(I)::S(F)
        • S(g);P_SPINS(g),XB(I)::S(F),XR(h)
        • P(d);OGATE,P_SPINP(d),XP(E)::QAR1(C),XP(d)
        • Q(i);N_GUARD::R1(H),XQ(i)
        • Q(i);P_PINR(H)::S(F),XR(h)
        • R(h);::R1(H)
        • S(g);::S(F),XR(h)
        • S(g);::R1(H)
      • Refutation
        • R(b);XQ(C)
    • Try
      • P(E);CHECK,XP(d)
      • Vars
        • K(e);N_GUARD,P-FLIGHT,S_CUTR(b)::R1(H),XS(f)
        • S(f);N_GUARD,P_SPINS(f)::QAR1(C),XS(f)
      • Refutation
        • R(b);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C),XS(f)
    • Vars
      • R(h);SBLOCK,XR(H)::R(J)+B(I),DCHECK,XS(f)
      • S(f);N_GUARD,XP(E)::S(F),XR(h)
      • S(f);N_GUARD,XR(J)::S(F),XR(h)
      • Q(i);N_GUARD::R1(H),XQ(i)
      • Q(i);N_GUARD::S(G),XQ(i)
      • Q(i);N_GUARD::R1(H)
      • R(b);OGATE,P_PINQ(C)::P(B)
      • S(f);N_GUARD::S(F),XR(h)
      • S(g);OGATE::P(D),XS(g)
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