MESON Chess Problem Database

Problem Display
PID: 645 (QN3b1n/4p3/2R5/K2k1N2/p3p2r/5PP1/6B1/4Rn2 w - - 0 1)

Mansfield, Comins

British Chess Magazine, 1917

QN3b1n/4p3/2R5/K2k1N2/p3p2r/5PP1/6B1/4Rn2

#2

9 + 8

3360 Simple Two-move Themes 1924
4797 A Genius of the Two-mover 1936
3147 Chess Problems: Introduction to an Art 1963
1077 Boletim da UBP 1987
3202 Complete Mansfield/I 1996

SOLUTION

  • SOUND
  • Sets
    • 1...exf3
      • 2.Rcc1#
      • 2.Rc2#
      • 2.Rc3#
      • 2.Rc7#
      • 2.Rc8#
    • 1...e3
      • 2.f4#
  • Tries
    • 1.Kb6?
      • threat
        • 2.Qa5#
      • 1...Ke5
        • 2.Qa5#
      • 1...e6
        • 2.Rc5#
      • 1...e5!
    • 1.Rec1?
      • threat
        • 2.R1c5#
      • 1...Ke5
        • 2.R1c5#
      • 1...e5
        • 2.Ra6#
        • 2.Rb6#
        • 2.Rd6#
        • 2.Rf6#
        • 2.Rg6#
        • 2.Rh6#
      • 1...e6
        • 2.R6c5#
      • 1...exf3!
    • 1.Rc5+?
      • 1...Kxc5
        • 2.Rc1#
        • 2.Qc6#
      • 1...Ke6!
    • 1.Rd6+?
      • 1...Kc5
        • 2.Rc1#
        • 2.Qd5#
        • 2.Qc6#
      • 1...Ke5
        • 2.Qd5#
      • 1...Kc4!
    • 1.Rf6+?
      • 1...Kc5
        • 2.Rc1#
        • 2.Qc6#
      • 1...Ke5
        • 2.Sd7#
      • 1...Kc4!
    • 1.Qa6?
      • threat
        • 2.Qb5#
      • 1...Ke5
        • 2.Rc5#
        • 2.Qb5#
      • 1...e5
        • 2.Qc4#
      • 1...e6!
    • 1.Qa7?
      • threat
        • 2.Qd4#
        • 2.Qc5#
      • 1...Ke5
        • 2.Qc5#
      • 1...exf3
        • 2.Rc5#
        • 2.Qc5#
        • 2.Qd7#
      • 1...Bg7
        • 2.Qc5#
      • 1...e3
        • 2.Qc5#
        • 2.f4#
      • 1...e6
        • 2.Qd4#
      • 1...e5!
    • 1.fxe4+?
      • 1...Ke5
        • 2.Sd7#
      • 1...Rxe4!
  • Keys
    • 1.Kb4!
      • threat
        • 2.Qa5#
      • 1...exf3+
        • 2.Rc4#
      • 1...e3+
        • 2.f4#
      • 1...e5+
        • 2.Rd6#
      • 1...e6+
        • 2.Rc5#
      • 1...Ke5
        • 2.Qa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(c);::B(B)+P(C)
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Threat
        • QAR(H)
      • Vars
        • K(e);P-FLIGHT,P_SPINP(c)::QAR(H)
        • P(f);SBLOCK::QAB(H)+R(G),DCHECK
      • Refutation
        • P(f);
    • Try
      • R(A);
      • Threat
        • R1(A)
      • Vars
        • K(e);P-FLIGHT::R(A)
        • P(f);SBLOCK::QAB(H)+R(G),DCHECK
      • Refutation
        • P(c);P_SPINP(c),XP(C)
    • Try
      • R(G);CHECK
      • Refutation
        • K(e);P_SPINP(c),S_FLIGHT
    • Try
      • R(G);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINP(c)::QAR1(H)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • R(G);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINP(c)::S(I)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(H);
      • Threat
        • QAR2(H)
      • Vars
        • P(f);SBLOCK::QAB1(H)
      • Refutation
        • P(f);
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • K(e);P-FLIGHT,P_SPINP(c)::QAR2(H)
        • B(g);::QAR1(H)
        • P(f);::QAR1(H)
      • Refutation
        • P(f);
    • Try
      • P(C);CHECK,XP(c)
      • Vars
        • K(e);P-FLIGHT::S(I)
      • Refutation
        • R(d);P_SPINR(d),XP(C)
  • Actual
    • K(E);S_FLIGHT
    • Threat
      • QAR(H)
    • Vars
      • P(c);CHECK,P_SPINP(c),XP(C)::QAB(H)+R(G)
      • P(c);CHECK::B(B)+P(C)
      • P(f);CHECK,SBLOCK::QAB(H)+R(G),DCHECK
      • K(e);P-FLIGHT,P_SPINP(c)::QAR(H)
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