MESON Chess Problem Database

Problem Display
PID: 202675 (8/3K3b/2B2p2/4kn2/5RPp/3p4/3Qrb2/5R2 w - - 0 1)

Evans, DO

Western Daily Mercury, 1919

(First published on Fri Aug 22 1919)

8/3K3b/2B2p2/4kn2/5RPp/3p4/3Qrb2/5R2

#2

6 + 8

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd2
      • 2.Re4#
    • 1...Re4
      • 2.Rxe4#
    • 1...Be3
      • 2.Re4#
    • 1...Bg3
      • 2.Qa5#
  • Tries
    • 1.Ra4?
      • threat
        • 2.Qf4#
      • 1...Rxd2
        • 2.Re4#
      • 1...Re3
        • 2.Qa5#
      • 1...Re4
        • 2.Rxe4#
      • 1...Be3
        • 2.Re4#
      • 1...Bg3
        • 2.Qa5#
      • 1...Se3
        • 2.Qc3#
      • 1...Sd4!
    • 1.Qa5+?
      • 1...Bc5
        • 2.Qxc5#
      • 1...Kxf4!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Qf4#
      • 1...Rxd2
        • 2.Re4#
      • 1...Sd4
        • 2.Rc5#
      • 1...Re3
        • 2.Qa5#
      • 1...Re4
        • 2.Rxe4#
      • 1...Be3
        • 2.Re4#
      • 1...Bg3
        • 2.Qa5#
      • 1...Se3
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(a);N_GUARD,XQ(B)::R1(C)
    • R(a);N_GUARD::R1(C),XR(a)
    • B(b);S_CUTR(a)::R1(C)
    • B(b);N_GUARD::QAR(B)
  • Tries
    • Try
      • R(C);
      • Threat
        • QAB1(B)
      • Vars
        • R(a);N_GUARD,XQ(B)::R1(C)
        • R(a);S_CUTB(b)::QAR(B)
        • R(a);N_GUARD::R1(C),XR(a)
        • B(b);S_CUTR(a)::R1(C)
        • B(b);N_GUARD::QAR(B)
        • S(f);N_GUARD,S_CUTB(b)::QAB(B)
      • Refutation
        • S(f);
    • Try
      • Q(B);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::QAR2(B),XB(b)
      • Refutation
        • K(e);P_SPINB(b),S_FLIGHT,XR(C)
  • Actual
    • R(C);
    • Threat
      • QAB1(B)
    • Vars
      • R(a);N_GUARD,XQ(B)::R1(C)
      • S(f);SBLOCK,S_CUTB(b)::R(C)
      • R(a);S_CUTB(b)::QAR(B)
      • R(a);N_GUARD::R1(C),XR(a)
      • B(b);S_CUTR(a)::R1(C)
      • B(b);N_GUARD::QAR(B)
      • S(f);N_GUARD,S_CUTB(b)::QAB(B)
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