MESON Chess Problem Database

Problem Display
PID: 36812 (K2n4/pRp3B1/4p3/2q5/N1k1P1BR/p2rp3/3r4/1Q6 w - - 0 1)

Hersom, Donald H

3rd Prize, BCF 010. Ty., 1932-1933

K2n4/pRp3B1/4p3/2q5/N1k1P1BR/p2rp3/3r4/1Q6

#2

8 + 10

14869 British Championship Solving Ty. 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qb4
      • 2.Rxb4#
      • 2.Qxb4#
    • 1...Qd4
      • 2.Rb4#
      • 2.Qb4#
      • 2.Qb5#
    • 1...Qd6
      • 2.Qb5#
    • 1...Qe7
      • 2.Qb5#
    • 1...Qf8
      • 2.Qb5#
    • 1...Qb5
      • 2.Qxb5#
    • 1...Qd5
      • 2.Qb4#
    • 1...Qe5
      • 2.Rb4#
      • 2.Qb4#
    • 1...Qf5
      • 2.Rb4#
      • 2.Qb4#
    • 1...Qg5
      • 2.Rb4#
      • 2.Qb4#
    • 1...Qh5
      • 2.Rb4#
      • 2.Qb4#
    • 1...Qc6
      • 2.Qb4#
    • 1...Rb3
      • 2.Qxb3#
    • 1...Rd4
      • 2.Qb3#
    • 1...Rd5
      • 2.Qb3#
    • 1...Rd6
      • 2.Qb3#
    • 1...Rd7
      • 2.Qb3#
  • Tries
    • 1.Bxe6+?
      • 1...Qd5
        • 2.Qb4#
        • 2.Qb5#
      • 1...Rd5
        • 2.Qb3#
      • 1...Sxe6!
    • 1.Qa2+?
      • 1...Rb3
        • 2.Qxb3#
      • 1...Rxa2!
    • 1.Qc2+?
      • 1...Rc3
        • 2.Qxc3#
      • 1...Rxc2!
    • 1.Qc1+?
      • 1...Rc3
        • 2.Qxc3#
      • 1...Rc2!
  • Keys
    • 1.e5!
      • threat
        • 2.Bxe6#
      • 1...Kd4
        • 2.Bf3#
        • 2.Bxe6#
      • 1...Kd5
        • 2.Bf3#
      • 1...Qd4
        • 2.Qb5#
      • 1...Qd5
        • 2.Qb4#
      • 1...Rd4
        • 2.Qb3#
      • 1...Rd5
        • 2.Be2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(f);N_GUARD::QAB1(A)
    • Q(f);N_GUARD::QAB1(A),XQ(f)
    • Q(f);N_GUARD,P_PINR(F)::QAR1(A)
    • R(c);N_GUARD::QAB1(A),XR(c)
    • R(c);N_GUARD::QAB1(A)
  • Tries
    • Try
      • B(D);CHECK,XP(g)
      • Vars
        • R(c);P_SPINR(c)::QAB1(A)
      • Refutation
        • S(j);XB(D)
    • Try
      • Q(A);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAB1(A),XR(c)
      • Refutation
        • R(a);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR1(A),XR(c)
      • Refutation
        • R(a);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR1(A),XR(c)
      • Refutation
        • R(a);P_SPINR(a)
  • Actual
    • P(C);
    • Threat
      • R(E)+B(D),DCHECK,XP(g)
    • Vars
      • K(e);S_FLIGHT::B(D)
      • Q(f);N_GUARD,SBLOCK::QAB1(A)
      • Q(f);N_GUARD,P_PINR(F),SBLOCK::QAR1(A)
      • R(c);N_GUARD,SBLOCK::QAB1(A)
      • R(c);SBLOCK::R(E)+B(D),DCHECK
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