MESON Chess Problem Database

Problem Display
PID: 190845 (8/8/5p1B/5N2/4P3/3p1k1P/3r1N2/5QK1 w - - 0 1)

Lewis, Robert Tony

Suomen Shakki, 1983

8/8/5p1B/5N2/4P3/3p1k1P/3r1N2/5QK1

#2

7 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Qxd1#
    • 1...Ra2
      • 2.Qxd3#
    • 1...Rb2
      • 2.Qxd3#
    • 1...Rc2
      • 2.Qxd3#
    • 1...Re2
      • 2.Qg2#
    • 1...Rxf2
      • 2.Qxd3#
  • Tries
    • 1.Sd1+?
      • 1...Rf2
        • 2.Qxd3#
      • 1...Kxe4!
    • 1.Sh1+?
      • 1...Rf2
        • 2.Qxd3#
      • 1...Kxe4!
    • 1.Sg4+?
      • 1...Rf2
        • 2.Qxd3#
      • 1...Kxe4!
    • 1.Bg5?
      • 1...Rxf2
        • 2.Qxd3#
      • 1...Rd1
        • 2.Qxd1#
      • 1...Ra2
        • 2.Qxd3#
      • 1...Rb2
        • 2.Qxd3#
      • 1...Rc2
        • 2.Qxd3#
      • 1...Re2
        • 2.Qg2#
      • 1...fxg5!
    • 1.Qe1?
      • threat
        • 2.Qe3#
      • 1...Rd1
        • 2.Qxd1#
      • 1...Re2!
    • 1.h4?
      • 1...Rd1
        • 2.Qxd1#
      • 1...Ra2
        • 2.Qxd3#
      • 1...Rb2
        • 2.Qxd3#
      • 1...Rc2
        • 2.Qxd3#
      • 1...Re2
        • 2.Qg2#
        • 2.Qh3#
      • 1...Rxf2!
    • 1.e5?
      • 1...Rxf2
        • 2.Qxd3#
      • 1...Rd1
        • 2.Qxd1#
      • 1...Ra2
        • 2.Qxd3#
      • 1...Rb2
        • 2.Qxd3#
      • 1...Rc2
        • 2.Qxd3#
      • 1...Re2
        • 2.Qg2#
      • 1...fxe5!
  • Keys
    • 1.Qc1!
      • 1...Rd1+
        • 2.Qxd1#
      • 1...Ke2
        • 2.Sd4#
      • 1...Rxf2
        • 2.Qe3#
      • 1...Ra2
        • 2.Qe3#
      • 1...Rb2
        • 2.Qe3#
      • 1...Rc2
        • 2.Qe3#
      • 1...Re2
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 5
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(a);N_GUARD,P_PINQ(A)::QAB(A),XR(a)
    • R(a);N_GUARD::QAR2(A),XP(b)
    • R(a);SBLOCK::QAB1(A)
    • R(a);N_GUARD,P_SPINR(a),XS(C)::QAR2(A),XP(b)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAR2(A),XP(b)
      • Refutation
        • K(c);S_FLIGHT,XP(E)
    • Try
      • S(C);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAR2(A),XP(b)
      • Refutation
        • K(c);S_FLIGHT,XP(E)
    • Try
      • S(C);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAR2(A),XP(b)
      • Refutation
        • K(c);S_FLIGHT,XP(E)
    • Try
      • B(G);
      • Vars
        • R(a);N_GUARD,P_SPINR(a),XS(C)::QAR2(A),XP(b)
        • R(a);N_GUARD,P_PINQ(A)::QAB(A),XR(a)
        • R(a);N_GUARD::QAR2(A),XP(b)
        • R(a);SBLOCK::QAB1(A)
      • Refutation
        • P(d);XB(G)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • R(a);N_GUARD,P_PINQ(A)::QAB(A),XR(a)
      • Refutation
        • R(a);
    • Try
      • P(D);
      • Vars
        • R(a);N_GUARD,P_PINQ(A)::QAB(A),XR(a)
        • R(a);N_GUARD::QAR2(A),XP(b)
      • Refutation
        • R(a);P_SPINR(a),XS(C)
    • Try
      • P(E);
      • Vars
        • R(a);N_GUARD,P_SPINR(a),XS(C)::QAR2(A),XP(b)
        • R(a);N_GUARD,P_PINQ(A)::QAB(A),XR(a)
        • R(a);N_GUARD::QAR2(A),XP(b)
        • R(a);SBLOCK::QAB1(A)
      • Refutation
        • P(d);XP(E)
  • Actual
    • Q(A);
    • Vars
      • R(a);CHECK,N_GUARD::QAB(A),XR(a)
      • K(c);S_FLIGHT::S(F)
      • R(a);OGATE,XS(C)::QAR1(A)
      • R(a);OGATE::QAR1(A)
      • R(a);OGATE,SBLOCK::QAR1(A)
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