MESON Chess Problem Database

Problem Display
PID: 4575 (8/2P1R1n1/Q1Bkp3/4R3/8/2K5/5B2/8 w - - 0 1)

Pierce, James

Illustrated London News, 1880

8/2P1R1n1/Q1Bkp3/4R3/8/2K5/5B2/8

#2

7 + 3

3360 Simple Two-move Themes 1924
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Sf5
      • 2.R5xe6#
    • 1...Sh5
      • 2.R5xe6#
    • 1...Se8
      • 2.R5xe6#
  • Tries
    • 1.Re1?
      • threat
        • 2.Rd7#
        • 2.c8S#
      • 1...e5
        • 2.c8S#
      • 1...Kxe7!
    • 1.Re2?
      • threat
        • 2.Rd7#
        • 2.c8S#
      • 1...e5
        • 2.c8S#
      • 1...Kxe7!
    • 1.Re4?
      • threat
        • 2.Rd7#
        • 2.c8S#
      • 1...e5
        • 2.c8S#
      • 1...Kxe7!
    • 1.Ra5?
      • threat
        • 2.Rd7#
        • 2.c8S#
      • 1...e5
        • 2.Bc5#
        • 2.c8S#
      • 1...Kxe7!
    • 1.Rb5?
      • threat
        • 2.Rd7#
        • 2.c8S#
      • 1...e5
        • 2.Bc5#
        • 2.c8S#
      • 1...Kxe7!
    • 1.Rc5?
      • threat
        • 2.Rd7#
        • 2.c8S#
      • 1...e5
        • 2.c8S#
      • 1...Kxe7!
    • 1.Rd5+?
      • 1...exd5
        • 2.c8S#
      • 1...Kxe7!
    • 1.Rf5?
      • threat
        • 2.Bc5#
        • 2.Rd7#
        • 2.c8S#
      • 1...Kxe7
        • 2.Bc5#
        • 2.Qa3#
      • 1...exf5
        • 2.c8S#
      • 1...e5
        • 2.c8S#
      • 1...Sxf5!
    • 1.Qe2?
      • 1...Kxc6
        • 2.Qa6#
      • 1...Sf5
        • 2.R5xe6#
      • 1...Sh5
        • 2.R5xe6#
      • 1...Se8
        • 2.R5xe6#
      • 1...Kxe7!
    • 1.Qa3+?
      • 1...Kxc6
        • 2.Qa6#
        • 2.c8Q#
        • 2.c8R#
      • 1...Kxe5!
    • 1.Qa5?
      • threat
        • 2.Qc5#
      • 1...Kxc6
        • 2.Qb6#
        • 2.Qa6#
      • 1...Kxe7!
  • Keys
    • 1.Qf1!
      • 1...Kxe5
        • 2.Bg3#
      • 1...Kxc6
        • 2.Qa6#
      • 1...Kxe7
        • 2.Bc5#
      • 1...Sf5
        • 2.R5xe6#
      • 1...Sh5
        • 2.R5xe6#
      • 1...Se8
        • 2.R5xe6#

This is a version of 64172

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD::R1(C),XP(b)
  • Tries
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::P=S
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT,XR(G)
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::P=S
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT,XR(G)
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::P=S
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT,XR(G)
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Refutation
        • K(a);S_FLIGHT,XR(G)
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Refutation
        • K(a);S_FLIGHT,XR(G)
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::P=S
      • Refutation
        • K(a);S_FLIGHT,XR(G)
    • Try
      • R(C);CHECK
      • Vars
        • P(b);N_GUARD,XR(C)::P=S
      • Refutation
        • K(a);S_FLIGHT,XR(G)
    • Try
      • R(C);
      • Threat
        • DUALS(3)
      • Vars
        • P(b);XR(C)::P=S
        • P(b);::P=S
      • Refutation
        • S(c);XR(C)
    • Try
      • Q(D);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XB(E)::QAR2(D)
        • S(c);N_GUARD::R1(C),XP(b)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT,XR(G)
    • Try
      • Q(D);CHECK
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT,XR(C)
    • Try
      • Q(D);
      • Threat
        • QAB1(D)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT,XR(G)
  • Actual
    • Q(D);
    • Vars
      • K(a);OGATEB,P_SPINP(b),S_FLIGHT,XR(C)::B(A)
      • K(a);OGATEB,P-FLIGHT,XB(E)::QAR2(D)
      • K(a);P_SPINP(b),S_FLIGHT,XR(G)::B(A)
      • S(c);N_GUARD::R1(C),XP(b)
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