MESON Chess Problem Database

Problem Display
PID: 196979 (q3r3/1n3Np1/1p1pP1R1/5k1n/2p3Rr/1b5p/pQ3K2/8 w - - 0 1)

Jerrard, Ernest Haslam Harvey

Brisbane Courier, 1919

q3r3/1n3Np1/1p1pP1R1/5k1n/2p3Rr/1b5p/pQ3K2/8

#2

6 + 13

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe6
      • 2.R6g5#
    • 1...Bc2
      • 2.Qxc2#
    • 1...Sa5
      • 2.Sxd6#
    • 1...Sc5
      • 2.Sxd6#
    • 1...Sd8
      • 2.Sxd6#
    • 1...d5
      • 2.Qe5#
  • Tries
    • 1.R4g5+?
      • 1...Kf4
        • 2.Qd4#
      • 1...Ke4!
    • 1.Qd4?
      • threat
        • 2.R4g5#
        • 2.Qe4#
        • 2.Qd5#
      • 1...Rxg4
        • 2.Qxg4#
      • 1...Rxe6
        • 2.R4g5#
        • 2.R6g5#
      • 1...a1Q
        • 2.R4g5#
        • 2.Qe4#
      • 1...a1B
        • 2.R4g5#
        • 2.Qe4#
      • 1...Qa5
        • 2.R4g5#
        • 2.Qe4#
      • 1...Qd8
        • 2.Qe4#
        • 2.Qd5#
      • 1...Bc2
        • 2.R4g5#
        • 2.Qd5#
      • 1...Sg3
        • 2.R4g5#
        • 2.Qf4#
        • 2.Qd5#
      • 1...Sf4
        • 2.R4g5#
        • 2.Qxf4#
      • 1...Sa5
        • 2.Sxd6#
        • 2.R4g5#
      • 1...Sc5
        • 2.Sxd6#
        • 2.R4g5#
      • 1...Sd8
        • 2.Sxd6#
        • 2.R4g5#
      • 1...c3
        • 2.R4g5#
        • 2.Qd3#
        • 2.Qe4#
      • 1...d5
        • 2.R4g5#
        • 2.Qe5#
        • 2.Qxd5#
      • 1...Sf6!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qe4#
      • 1...Rxg4
        • 2.Qxg4#
      • 1...Rxe6
        • 2.Qxe6#
      • 1...Bc2
        • 2.Qxc2#
      • 1...Sg3
        • 2.Qf3#
      • 1...Sf4
        • 2.R4g5#
      • 1...Sf6
        • 2.R6g5#
      • 1...Sa5
        • 2.Sxd6#
      • 1...Sc5
        • 2.Sxd6#
      • 1...Sd8
        • 2.Sxd6#
      • 1...d5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(m);SBLOCK,XP(D)::R1(E)
    • B(b);N_GUARD::QAB(A),XB(b)
    • S(j);N_GUARD::S(F),XP(i)
    • P(i);N_GUARD::QAR1(A)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(f);P-FLIGHT::QAR2(A)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • R(e);OGATE,XR(C)::QAB1(A),XR(e)
      • Refutation
        • S(g);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • R(e);OGATE,XR(C)::QAB1(A),XR(e)
      • R(m);OGATE,XP(D)::QAB1(A),XR(m)
      • B(b);N_GUARD::QAB(A),XB(b)
      • S(g);N_GUARD::QAR2(A)
      • S(g);SBLOCK::R1(C)
      • S(g);SBLOCK::R1(E)
      • S(j);N_GUARD::S(F),XP(i)
      • P(i);N_GUARD::QAR1(A)
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