MESON Chess Problem Database

Problem Display
PID: 159595 (6B1/3pPRB1/1Q1q1N2/rR6/P1k5/4K3/4P3/1N6 w - - 0 1)

Tomson, Brian

Comm., Problem Observer, 1978

6B1/3pPRB1/1Q1q1N2/rR6/P1k5/4K3/4P3/1N6

#2

11 + 4

15561 Fifty Chess Problems (Brian Tomson) 1983
3713 Snap 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.Rb4#
      • 2.Qd4#
      • 2.Qc5#
    • 1...Qb4
      • 2.Rxb4#
    • 1...Qc5+
      • 2.Qxc5#
    • 1...Qc7
      • 2.Rb4#
      • 2.Qd4#
      • 2.Qxc7#
    • 1...Qb8
      • 2.Rb4#
      • 2.Qd4#
      • 2.Qc5#
    • 1...Qd1
      • 2.Rb4#
      • 2.Qc5#
      • 2.Qc7#
    • 1...Qd3+
      • 2.exd3#
    • 1...Qd4+
      • 2.Qxd4#
    • 1...Qd5
      • 2.Rb4#
    • 1...Qc6
      • 2.Rb4#
      • 2.Qd4#
    • 1...Qxf6
      • 2.Qc5#
    • 1...Rxb5
      • 2.Qxb5#
  • Tries
    • 1.Sa3+?
      • 1...Kc3
        • 2.Se4#
        • 2.Sd5#
        • 2.Rb3#
      • 1...Qxa3+!
    • 1.Rf8+?
      • 1...Qd5
        • 2.Bxd5#
        • 2.Rb4#
        • 2.Rc8#
        • 2.Qd4#
        • 2.Qc5#
        • 2.Qc7#
      • 1...Qe6+!
    • 1.Qxd6?
      • threat
        • 2.Rb4#
        • 2.Rf8#
        • 2.Qb4#
        • 2.Qf4#
        • 2.Qc5#
        • 2.Qc7#
        • 2.Qd3#
        • 2.Qd4#
        • 2.Qd5#
      • 1...Rxa4
        • 2.Qc5#
        • 2.Qd3#
        • 2.Qd5#
      • 1...Ra6
        • 2.Rb4#
        • 2.Rf8#
        • 2.Qb4#
        • 2.Qf4#
        • 2.Qc5#
        • 2.Qd3#
        • 2.Qd4#
        • 2.Qd5#
      • 1...Ra7
        • 2.Rb4#
        • 2.Rf8#
        • 2.Qb4#
        • 2.Qf4#
        • 2.Qc5#
        • 2.Qd3#
        • 2.Qd4#
        • 2.Qd5#
      • 1...Rxb5!
  • Keys
    • 1.Sxd7!
      • threat
        • 2.Rf4#
      • 1...Qa3+
        • 2.Sxa3#
      • 1...Qg3+
        • 2.Rf3#
      • 1...Qf4+
        • 2.Rxf4#
      • 1...Qc5+
        • 2.Qxc5#
      • 1...Qe5+
        • 2.Sxe5#
      • 1...Qxe7+
        • 2.Rxe7#
      • 1...Qd2+
        • 2.Sxd2#
      • 1...Qd3+
        • 2.exd3#
      • 1...Qd4+
        • 2.Qxd4#
      • 1...Qxb6+
        • 2.Sxb6#
      • 1...Qe6+
        • 2.Qxe6#
      • 1...Qf6
        • 2.Rxf6#
        • 2.Qc5#

Anticipated by 145262(1918)

This is after

After R. Batori.

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 4
  • Sets
    • Q(c);N_GUARD::R1(E),XQ(c)
    • Q(c);CHECK,N_GUARD::QAR1(F),XQ(c)
    • Q(c);CHECK,OGATE::P(B),XQ(c)
    • Q(c);N_GUARD::R1(E)
    • Q(c);N_GUARD,XS(G)::QAR1(F)
    • R(b);OGATE,XR(E)::QAB1(F),XR(b)
  • Tries
    • Try
      • S(A);CHECK
      • Refutation
        • Q(c);CHECK,XS(A)
    • Try
      • R(I);CHECK
      • Refutation
        • Q(c);CHECK,P_SPINQ(c)
    • Try
      • Q(F);XQ(c)
      • Threat
        • DUALS(9)
      • Refutation
        • R(b);XR(E)
  • Actual
    • S(G);XP(d)
    • Threat
      • B(K)+R(I),DCHECK
    • Vars
      • Q(c);CHECK,N_GUARD::S(A),XQ(c)
      • Q(c);CHECK,N_GUARD::B(K)+R(I)
      • Q(c);CHECK::B(K)+R(I),DCHECK,XQ(c)
      • Q(c);CHECK,N_GUARD::QAR1(F),XQ(c)
      • Q(c);CHECK,N_GUARD::S(G),XQ(c)
      • Q(c);CHECK,OGATE,XP(H)::B(K)+R(I),XQ(c)
      • Q(c);CHECK,OGATE::P(B),XQ(c)
      • Q(c);CHECK,XQ(F)::S(G),XQ(c)
      • Q(c);CHECK,OGATE::QAB(F),XQ(c)
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