MESON Chess Problem Database

Problem Display
PID: 21311 (5N1K/q1p3Pp/p3P2r/4kbbR/2PpN2r/Q2p1PP1/7B/4R3 w - - 0 1)

Chandler, Guy Wills

Mansfield, Comins

1st Prize, Good Companions (January black Bishop), 1918

5N1K/q1p3Pp/p3P2r/4kbbR/2PpN2r/Q2p1PP1/7B/4R3

#2

12 + 11

3132 The Good Companion Two-Mover 1922
3391 Het Half Pin Thema 1924
4797 A Genius of the Two-mover 1936
3098 FIDE Album (1914-1944) (I) 1971
3202 Complete Mansfield/I 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Qxc5#
    • 1...Qb8
      • 2.Qc5#
    • 1...Rxe6
      • 2.Sd7#
    • 1...Bh3
      • 2.g4#
    • 1...Bf6
      • 2.gxh4#
    • 1...Be7
      • 2.gxh4#
    • 1...Bd8
      • 2.gxh4#
    • 1...c6
      • 2.Qd6#
  • Tries
    • 1.Sxg5+?
      • 1...Kf6
        • 2.g8S#
      • 1...Re4
        • 2.Sd7#
      • 1...Be4!
    • 1.Sf6+?
      • 1...Kxf6
        • 2.g8S#
      • 1...Re4
        • 2.S6d7#
      • 1...Be3
        • 2.S6d7#
      • 1...Be4!
    • 1.Qa5+?
      • 1...Qc5
        • 2.Qxc5#
      • 1...c5!
    • 1.g4+?
      • 1...Bf4
        • 2.Rxf5#
      • 1...Rxh2!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Sd7#
      • 1...Bxe4
        • 2.Rxg5#
      • 1...Bxe6
        • 2.Rxg5#
      • 1...Bxe7
        • 2.gxh4#
      • 1...Bh3
        • 2.g4#
      • 1...Bg4
        • 2.Sd6#
      • 1...Bg6
        • 2.Qf6#
      • 1...Qb8
        • 2.Qc5#
      • 1...Qa8
        • 2.Qxc7#
      • 1...c5
        • 2.Qd6#
      • 1...c6
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • Q(i);N_GUARD::QAR2(C),XQ(i)
    • Q(i);N_GUARD,P_PINS(K)::QAR2(C)
    • R(h);SBLOCK,XP(I)::S(K)
    • B(e);P_SPINB(f),S_CUTR(c)::B(B)+P(E)
    • B(f);N_GUARD,P_PINP(J),P_SPINB(e)::B(B)+P(E),XR(c)
    • B(f);N_GUARD,P_SPINB(e)::B(B)+P(E),XR(c)
    • P(j);N_GUARD::QAB1(C)
  • Tries
    • Try
      • S(G);CHECK,XB(f)
      • Vars
        • K(d);S_FLIGHT::P=S
        • R(c);P_SPINR(c)::S(K)
      • Refutation
        • B(e);P_SPINB(e)
    • Try
      • S(G);CHECK
      • Vars
        • K(d);S_FLIGHT,XS(G)::P=S
        • R(c);P_SPINR(c)::S(G)
        • B(f);P_SPINB(f)::S(G)
      • Refutation
        • B(e);P_SPINB(e)
    • Try
      • Q(C);CHECK
      • Vars
        • Q(i);N_GUARD,P_SPINQ(i)::QAR2(C),XQ(i)
      • Refutation
        • P(j);P_SPINP(j)
    • Try
      • P(E);CHECK
      • Vars
        • B(f);OGATE,P_SPINB(f)::R1(H),XB(e)
      • Refutation
        • R(c);XB(B)
  • Actual
    • Q(C);
    • Threat
      • S(K)
    • Vars
      • B(e);OGATEB,P_SPINB(e),XS(G)::R(H),XB(f)
      • B(e);OGATEB,P_SPINB(f),XP(I)::R(H),XB(f)
      • B(f);N_GUARD,P_SPINB(e),XQ(C)::B(B)+P(E),XR(c)
      • B(e);P_SPINB(f),S_CUTR(c)::B(B)+P(E)
      • B(e);N_GUARD,P_SPINB(f),S_CUTR(c)::R(A)+S(G)
      • B(e);P_SPINB(f),S_CUTR(h)::QAB1(C)
      • Q(i);N_GUARD,P_PINS(K)::QAR2(C)
      • Q(i);N_GUARD,P_PINS(K)::QAB(C),XP(j)
      • P(j);N_GUARD::QAB1(C)
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