MESON Chess Problem Database

Problem Display
PID: 196899 (1B4R1/1n1p3K/8/3k1P2/1P5R/8/qPQ5/5n1b w - - 0 1)

Marshall, Burney Means

British Chess Magazine, 1919

1B4R1/1n1p3K/8/3k1P2/1P5R/8/qPQ5/5n1b

#2

8 + 6

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Qc4#
    • 1...Qc4
      • 2.Qxc4#
    • 1...Qa1
      • 2.Qc4#
    • 1...Qxb2
      • 2.Qc4#
    • 1...Qa3
      • 2.Qc4#
    • 1...Qa4
      • 2.Qc4#
    • 1...Qa5
      • 2.Qc4#
    • 1...Qa7
      • 2.Qc4#
    • 1...Qa8
      • 2.Qc4#
    • 1...Bg2
      • 2.Qxg2#
    • 1...Be4
      • 2.Qxe4#
    • 1...Sa5
      • 2.Qc5#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sd6
      • 2.Qc5#
    • 1...Sd8
      • 2.Qc5#
  • Tries
    • 1.Rgg4?
      • threat
        • 2.Rd4#
      • 1...Qxb2
        • 2.Qc4#
      • 1...Qc4
        • 2.Qxc4#
      • 1...Be4
        • 2.Qxe4#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sd6
        • 2.Qc5#
      • 1...Qa7
        • 2.Qc4#
      • 1...d6!
    • 1.Re8?
      • threat
        • 2.Re5#
      • 1...Qxb2
        • 2.Qc4#
      • 1...Qc4
        • 2.Qxc4#
      • 1...Be4
        • 2.Qxe4#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sd6
        • 2.Qc5#
      • 1...d6!
  • Keys
    • 1.Rg2!
      • threat
        • 2.Qe4#
      • 1...Bxg2
        • 2.Qxg2#
      • 1...Qc4
        • 2.Qxc4#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sd6
        • 2.Qc5#
      • 1...Qb1
        • 2.Qc4#
      • 1...Sd2
        • 2.Rxd2#
      • 1...Sg3
        • 2.Rd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • Q(c);N_GUARD::QAB1(B)
    • Q(c);N_GUARD::QAB1(B),XQ(c)
    • Q(c);N_GUARD,XP(A)::QAB1(B)
    • B(b);N_GUARD::QAB(B),XB(b)
    • B(b);N_GUARD,P_PINP(E)::QAB1(B),XB(b)
    • S(e);N_GUARD::QAR1(B)
    • S(e);N_GUARD::QAR1(B),XS(e)
  • Tries
    • Try
      • R(H);
      • Threat
        • R1(H)
      • Vars
        • Q(c);N_GUARD,XP(A)::QAB1(B)
        • Q(c);N_GUARD::QAB1(B),XQ(c)
        • B(b);N_GUARD,P_PINP(E)::QAB1(B),XB(b)
        • S(e);N_GUARD::QAR1(B),XS(e)
        • S(e);N_GUARD::QAR1(B)
        • Q(c);N_GUARD::QAB1(B)
      • Refutation
        • P(f);
    • Try
      • R(H);
      • Threat
        • R1(H)
      • Vars
        • Q(c);N_GUARD,XP(A)::QAB1(B)
        • Q(c);N_GUARD::QAB1(B),XQ(c)
        • B(b);N_GUARD,P_PINP(E)::QAB1(B),XB(b)
        • S(e);N_GUARD::QAR1(B),XS(e)
        • S(e);N_GUARD::QAR1(B)
      • Refutation
        • P(f);
  • Actual
    • R(H);
    • Threat
      • QAB1(B)
    • Vars
      • B(b);OGATE,XR(H)::QAB(B),XB(b)
      • Q(c);N_GUARD::QAB1(B),XQ(c)
      • S(e);N_GUARD::QAR1(B),XS(e)
      • S(e);N_GUARD::QAR1(B)
      • Q(c);N_GUARD::QAB1(B)
      • S(a);N_GUARD::R(H),XS(a)
      • S(a);N_GUARD::R(H)
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