MESON Chess Problem Database

Problem Display
PID: 267601 (8/8/1B1N3p/1p5r/1pR4r/nN1k1p1p/3b4/Q2K4 w - - 0 1)

Swords, WJ

Sunday Referee, 1939

(First published on Sun Apr 2 1939)

8/8/1B1N3p/1p5r/1pR4r/nN1k1p1p/3b4/Q2K4

#2

6 + 10

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Qxd4#
    • 1...Bc1
      • 2.Sxc1#
    • 1...Be1
      • 2.Sc1#
    • 1...Bc3
      • 2.Sc1#
    • 1...Bf4
      • 2.Qd4#
    • 1...Sb1
      • 2.Qxb1#
  • Tries
    • 1.Rc3+?
      • 1...Bxc3
        • 2.Sc1#
      • 1...bxc3!
    • 1.Rd4+?
      • 1...Rxd4
        • 2.Qxd4#
      • 1...Ke3!
    • 1.Qc3+?
      • 1...Bxc3
        • 2.Sc1#
      • 1...bxc3!
    • 1.Qb1+?
      • 1...Sc2
        • 2.Qxc2#
      • 1...Sxb1!
    • 1.Qxa3?
      • threat
        • 2.Sc1#
        • 2.Sc5#
      • 1...Rxc4
        • 2.Sc1#
      • 1...bxc4
        • 2.Sc1#
      • 1...Rc5
        • 2.Sc1#
        • 2.Sxc5#
      • 1...Bc1
        • 2.Sxc1#
        • 2.Sc5#
      • 1...Bc3
        • 2.Sc1#
      • 1...bxa3!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Qxd2#
      • 1...Bxc1
        • 2.Sxc1#
      • 1...Sxc4
        • 2.Qc2#
      • 1...Be1
        • 2.Qe3#
      • 1...Bc3
        • 2.Qe3#
      • 1...Be3
        • 2.Qxe3#
      • 1...Bf4
        • 2.Rd4#
      • 1...Bg5
        • 2.Sc5#
      • 1...Sb1
        • 2.Qxb1#
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(g);N_GUARD::QAR1(A),XR(g)
    • B(a);N_GUARD::S(C),XB(a)
    • B(a);N_GUARD::S(C)
    • B(a);S_CUTR(g)::QAR1(A)
    • S(b);N_GUARD::QAB(A),XS(b)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • B(a);XR(D)::S(C)
      • Refutation
        • P(f);XR(D)
    • Try
      • R(D);CHECK
      • Vars
        • R(g);OGATE,XR(D)::QAR1(A),XR(g)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • B(a);XQ(A)::S(C)
      • Refutation
        • P(f);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB1(A),XS(b)
      • Refutation
        • S(b);XQ(A)
    • Try
      • Q(A);XS(b)
      • Threat
        • DUALS(2)
      • Vars
        • R(g);XR(D)::QAR(A)+S(C),DCHECK
        • P(h);XR(D)::QAR(A)+S(C),DCHECK
        • B(a);::S(C)
      • Refutation
        • P(f);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XB(a)
    • Vars
      • B(a);XQ(A)::S(C),XB(a)
      • S(b);N_GUARD,XR(D)::QAB1(A)
      • B(a);OGATE::QAR1(A)
      • B(a);OGATE::QAR1(A),XB(a)
      • B(a);S_CUTR(g)::R1(D)
      • B(a);S_CUTR(i)::S(C)
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