MESON Chess Problem Database

Problem Display
PID: 360 (6K1/6B1/R4pk1/2p3pn/8/3R3Q/p1Bp1P2/bq6 w - - 0 1)

Mansfield, Comins

The Observer, 1932

(First published on Sun Jul 3 1932)

6K1/6B1/R4pk1/2p3pn/8/3R3Q/p1Bp1P2/bq6

#2

7 + 9

3550 Complete Mansfield/II 1997
15239 Valois Notebooks 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Re3#
    • 1...Qg1
      • 2.Rxd2#
      • 2.Rda3#
      • 2.Rb3#
      • 2.Rc3#
      • 2.Re3#
      • 2.Rf3#
      • 2.Rg3#
      • 2.Rd4#
      • 2.Rd5#
      • 2.Rdd6#
      • 2.Rd7#
      • 2.Rd8#
    • 1...Qh1
      • 2.Rf3#
    • 1...Qb3+
      • 2.Rxb3#
    • 1...Qb4
      • 2.Rd4#
    • 1...Qb6
      • 2.Rd6#
    • 1...Qb7
      • 2.Rd5#
    • 1...Qb8+
      • 2.Rd8#
    • 1...Sg3
      • 2.Qh7#
    • 1...Sf4
      • 2.Qh7#
    • 1...Sxg7
      • 2.Qh7#
    • 1...g4
      • 2.Qxg4#
  • Tries
    • 1.f4?
      • threat
        • 2.f5#
      • 1...Qb3+
        • 2.Rxb3#
      • 1...Qb8+
        • 2.Rd8#
      • 1...Sxf4
        • 2.Qh7#
      • 1...Sxg7
        • 2.Qh7#
      • 1...gxf4
        • 2.Rg3#
        • 2.Qg4#
      • 1...g4
        • 2.Qxg4#
      • 1...Sg3
        • 2.Qh7#
      • 1...Qf1!
  • Keys
    • 1.Qh4!
      • threat
        • 2.Qe4#
      • 1...Qb3+
        • 2.Rxb3#
      • 1...Qb8+
        • 2.Rd8#
      • 1...Kf5
        • 2.Rd5#
      • 1...Sxg7
        • 2.Qh7#
      • 1...gxh4
        • 2.Rg3#
      • 1...Qe1
        • 2.Re3#
      • 1...Qh1
        • 2.Rf3#
      • 1...Qb4
        • 2.Rd4#
      • 1...Qb6
        • 2.Rd6#
      • 1...Qb7
        • 2.Rd5#
      • 1...Sg3
        • 2.Qh7#
      • 1...Sf4
        • 2.Qh7#
      • 1...g4
        • 2.Qxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(b);N_GUARD::B(A)+R(C)
    • Q(b);CHECK,N_GUARD::B(A)+R(C),XQ(b)
    • Q(b);N_GUARD,N_SPINP(h)::B(A)+R(C)
    • Q(b);CHECK,N_GUARD::B(A)+R(C)
    • S(g);OGATE::QAB1(D)
    • S(g);OGATE,XB(F)::QAB1(D)
    • P(f);OGATEB::QAR2(D),XP(f)
  • Tries
    • Try
      • P(B);
      • Threat
        • P(B)
      • Vars
        • Q(b);CHECK,N_GUARD::B(A)+R(C),XQ(b)
        • Q(b);CHECK,N_GUARD::B(A)+R(C)
        • S(g);OGATE,XP(B)::QAB1(D)
        • S(g);OGATE,XB(F)::QAB1(D)
        • P(f);OGATEB::QAR2(D),XP(f)
        • S(g);OGATE::QAB1(D)
      • Refutation
        • Q(b);
  • Actual
    • Q(D);
    • Threat
      • QAB(D)
    • Vars
      • Q(b);CHECK,N_GUARD::B(A)+R(C),XQ(b)
      • Q(b);CHECK,N_GUARD::B(A)+R(C)
      • K(i);N_SPINP(h),S_FLIGHT::B(A)+R(C),DCHECK
      • S(g);OGATE,XB(F)::QAB1(D)
      • P(f);XQ(D)::B(A)+R(C),DCHECK
      • Q(b);N_GUARD::B(A)+R(C)
      • Q(b);N_GUARD,N_SPINP(h)::B(A)+R(C)
      • S(g);OGATE::QAB1(D)
      • P(f);OGATEB::QAR2(D),XP(f)
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