MESON Chess Problem Database

Problem Display
PID: 6738 (2R5/1p5B/2r5/6n1/p3N3/P3K2p/2k3bR/Q1N5 w - - 0 1)

Mansfield, Comins

Evening News, 1933

(First published on Mon Feb 27 1933)

2R5/1p5B/2r5/6n1/p3N3/P3K2p/2k3bR/Q1N5

#2

8 + 7

5862 An ABC of Chess Problems 1970
4640 Chess Wizardry: The New ABC of Chess Problems 1996
3550 Complete Mansfield/II 1997
14867 BCPS Library 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Sf2#
    • 1...Se6
      • 2.Sc3#
  • Tries
    • 1.Se2?
      • threat
        • 2.Sd4#
      • 1...Rc3+
        • 2.Rxc3#
      • 1...Kb3
        • 2.Sd2#
      • 1...Sf3
        • 2.Sd2#
      • 1...Se6!
    • 1.Sc3+?
      • 1...Rg6
        • 2.Qb1#
      • 1...Se4
        • 2.Bxe4#
      • 1...Sxh7!
    • 1.Rxc6+?
      • 1...Kd1
        • 2.Sa2#
        • 2.Se2#
        • 2.Sb3#
        • 2.Sd3#
      • 1...bxc6!
    • 1.Qb2+?
      • 1...Kd1
        • 2.Qd2#
      • 1...Kxb2!
    • 1.Qc3+?
      • 1...Kb1
        • 2.Sd2#
      • 1...Kd1
        • 2.Sf2#
        • 2.Qd2#
      • 1...Rxc3+!
    • 1.Qa2+?
      • 1...Kd1
        • 2.Qd2#
      • 1...Kxc1!
  • Keys
    • 1.Sb3!
      • threat
        • 2.Sd4#
      • 1...Rc3+
        • 2.Rxc3#
      • 1...Kxb3
        • 2.Sd2#
      • 1...axb3
        • 2.Sxg5#
      • 1...Sf3
        • 2.Sed2#
      • 1...Se6
        • 2.Sec5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD::B(G)+S(F)
  • Tries
    • Try
      • S(B);N_PINB(b)
      • Threat
        • S(B)
      • Vars
        • R(f);CHECK,OGATE::R1(H),XR(f)
        • K(a);N_SPINR(f),S_FLIGHT::S(F)
        • S(e);N_GUARD,S_CUTB(b)::B(G)+S(F)
      • Refutation
        • S(e);
    • Try
      • S(F);CHECK,N_PINR(f)
      • Vars
        • R(f);P_SPINR(f)::QAB1(A)
        • S(e);N_GUARD,P_SPINS(e)::B(G),XS(e)
      • Refutation
        • S(e);XB(G)
    • Try
      • R(H);CHECK,XR(f)
      • Refutation
        • P(g);XR(H)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);N_SPINB(b),N_SPINR(f),OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);N_SPINR(f),P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK,N_PINR(f)
      • Vars
        • K(a);N_SPINB(b),S_FLIGHT::B(G)+S(F),DCHECK
      • Refutation
        • R(f);CHECK,P_SPINR(f),XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);N_SPINB(b),N_SPINR(f),OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);N_SPINB(b),P-FLIGHT,XS(B)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • R(f);CHECK,OGATE::R1(H),XR(f)
      • K(a);N_SPINB(b),N_SPINR(f),S_FLIGHT,XS(B)::S(F)
      • P(d);SBLOCK,XS(B)::B(G)+S(F),XS(e)
      • S(e);N_GUARD::B(G)+S(F)
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