MESON Chess Problem Database

Problem Display
PID: 224674 (q2Q4/rk1K4/p3N3/Pn1N1p2/n4B2/7b/6R1/7B w - - 0 1)

Woodard, Eugene

The Sunny South, 1887

q2Q4/rk1K4/p3N3/Pn1N1p2/n4B2/7b/6R1/7B

#2

8 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qb8
      • 2.Qxb8#
    • 1...Qc8+
      • 2.Qxc8#
    • 1...Sb2
      • 2.Sc5#
      • 2.Qb6#
    • 1...Sac3
      • 2.Sc5#
      • 2.Qb6#
    • 1...Sc5+
      • 2.Sxc5#
    • 1...Sb6+
      • 2.Qxb6#
    • 1...Sa3
      • 2.Qc7#
    • 1...Sbc3
      • 2.Qc7#
    • 1...Sd4
      • 2.Qc7#
    • 1...Sd6
      • 2.Qc7#
    • 1...Sc7
      • 2.Qxc7#
  • Tries
    • 1.Sc3?
      • 1...Qc8+
        • 2.Qxc8#
      • 1...Sc5+
        • 2.Sxc5#
      • 1...Sb6+
        • 2.Qxb6#
      • 1...Bxg2
        • 2.Bxg2#
      • 1...Saxc3
        • 2.Sc5#
        • 2.Qb6#
      • 1...Sbxc3
        • 2.Rb2#
        • 2.Qc7#
      • 1...Qb8
        • 2.Qxb8#
      • 1...Bg4
        • 2.Rxg4#
      • 1...Sb2
        • 2.Sc5#
        • 2.Qb6#
      • 1...Sa3
        • 2.Rb2#
        • 2.Qc7#
      • 1...Sd4
        • 2.Rb2#
        • 2.Qc7#
      • 1...Sd6
        • 2.Rb2#
        • 2.Qc7#
      • 1...Sc7
        • 2.Rb2#
        • 2.Qxc7#
      • 1...Qxd8+!
    • 1.Se3?
      • 1...Qc8+
        • 2.Qxc8#
      • 1...Sc5+
        • 2.Sxc5#
      • 1...Sb6+
        • 2.Qxb6#
      • 1...Bxg2
        • 2.Bxg2#
      • 1...Qb8
        • 2.Qxb8#
      • 1...Bg4
        • 2.Rxg4#
      • 1...Sb2
        • 2.Sc5#
        • 2.Qb6#
      • 1...Sac3
        • 2.Sc5#
        • 2.Qb6#
      • 1...Sa3
        • 2.Rb2#
        • 2.Qc7#
      • 1...Sbc3
        • 2.Rb2#
        • 2.Qc7#
      • 1...Sd4
        • 2.Rb2#
        • 2.Qc7#
      • 1...Sd6
        • 2.Rb2#
        • 2.Qc7#
      • 1...Sc7
        • 2.Rb2#
        • 2.Qxc7#
      • 1...Qxd8+!
    • 1.Sb4?
      • 1...Qc8+
        • 2.Qxc8#
      • 1...Sc5+
        • 2.Sxc5#
      • 1...Sb6+
        • 2.Qxb6#
      • 1...Bxg2
        • 2.Bxg2#
      • 1...Qb8
        • 2.Qxb8#
      • 1...Bg4
        • 2.Rxg4#
      • 1...Sb2
        • 2.Sc5#
        • 2.Qb6#
      • 1...Sac3
        • 2.Sc5#
        • 2.Qb6#
      • 1...Sa3
        • 2.Qc7#
      • 1...Sbc3
        • 2.Qc7#
      • 1...Sd4
        • 2.Qc7#
      • 1...Sd6
        • 2.Qc7#
      • 1...Sc7
        • 2.Qxc7#
      • 1...Qxd8+!
    • 1.Sf6?
      • 1...Qc8+
        • 2.Qxc8#
      • 1...Sc5+
        • 2.Sxc5#
      • 1...Sb6+
        • 2.Qxb6#
      • 1...Bxg2
        • 2.Bxg2#
      • 1...Qb8
        • 2.Qxb8#
      • 1...Bg4
        • 2.Rxg4#
      • 1...Sb2
        • 2.Sc5#
        • 2.Qb6#
      • 1...Sac3
        • 2.Sc5#
        • 2.Qb6#
      • 1...Sa3
        • 2.Rb2#
        • 2.Qc7#
      • 1...Sbc3
        • 2.Rb2#
        • 2.Qc7#
      • 1...Sd4
        • 2.Rb2#
        • 2.Qc7#
      • 1...Sd6
        • 2.Rb2#
        • 2.Qc7#
      • 1...Sc7
        • 2.Rb2#
        • 2.Qxc7#
      • 1...Qxd8+!
    • 1.Se7?
      • 1...Qc8+
        • 2.Qxc8#
      • 1...Sc5+
        • 2.Sxc5#
      • 1...Sb6+
        • 2.Qxb6#
      • 1...Bxg2
        • 2.Bxg2#
      • 1...Qb8
        • 2.Qxb8#
      • 1...Bg4
        • 2.Rxg4#
      • 1...Sb2
        • 2.Sc5#
        • 2.Qb6#
      • 1...Sac3
        • 2.Sc5#
        • 2.Qb6#
      • 1...Sa3
        • 2.Rb2#
        • 2.Qc7#
      • 1...Sbc3
        • 2.Rb2#
        • 2.Qc7#
      • 1...Sd4
        • 2.Rb2#
        • 2.Qc7#
      • 1...Sd6
        • 2.Rb2#
        • 2.Qc7#
      • 1...Sc7
        • 2.Rb2#
        • 2.Qxc7#
      • 1...Qxd8+!
    • 1.Bb8?
      • threat
        • 2.Qc8#
      • 1...Sc5+
        • 2.Sxc5#
      • 1...Sb6+
        • 2.Qxb6#
      • 1...Sd6
        • 2.Qc7#
      • 1...Qxb8!
    • 1.Rb2?
      • threat
        • 2.Qc7#
      • 1...Qc8+
        • 2.Qxc8#
      • 1...Sc5+
        • 2.Sxc5#
      • 1...Sb6+
        • 2.Qxb6#
      • 1...Sxb2
        • 2.Sc5#
        • 2.Qb6#
      • 1...Qb8
        • 2.Qxb8#
      • 1...Qxd8+!
  • Keys
    • 1.Sb6!
      • 1...Qc8+
        • 2.Qxc8#
      • 1...Qxd8+
        • 2.Sxd8#
      • 1...Sc5+
        • 2.Sxc5#
      • 1...Sxb6+
        • 2.Qxb6#
      • 1...Bxg2
        • 2.Bxg2#
      • 1...Qb8
        • 2.Qxb8#
      • 1...Bg4
        • 2.Rxg4#
      • 1...Sb2
        • 2.Sc5#
      • 1...Sac3
        • 2.Sc5#
      • 1...Sa3
        • 2.Qc7#
      • 1...Sbc3
        • 2.Qc7#
      • 1...Sd4
        • 2.Qc7#
      • 1...Sd6
        • 2.Qc7#
      • 1...Sc7
        • 2.Qxc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(h);N_GUARD::QAR1(H),XQ(h)
    • Q(h);CHECK,N_GUARD::QAB1(H),XQ(h)
    • S(b);CHECK,N_GUARD::S(F),XS(b)
    • S(b);CHECK,N_GUARD::QAR1(H),XS(b)
    • S(c);N_GUARD::QAR1(H)
    • S(c);N_GUARD::QAR1(H),XS(c)
  • Tries
    • Try
      • S(E);
      • Vars
        • Q(h);CHECK,N_GUARD::QAB1(H),XQ(h)
        • S(b);CHECK,N_GUARD::S(F),XS(b)
        • S(b);CHECK,N_GUARD::QAR1(H),XS(b)
        • B(a);OGATE,P_SPINB(a),XR(B)::B(A),XB(a)
        • Q(h);N_GUARD::QAR1(H),XQ(h)
        • B(a);N_GUARD::B(A)+R(B),XB(a)
      • Refutation
        • Q(h);CHECK,XQ(H)
    • Try
      • S(E);
      • Vars
        • Q(h);CHECK,N_GUARD::QAB1(H),XQ(h)
        • S(b);CHECK,N_GUARD::S(F),XS(b)
        • S(b);CHECK,N_GUARD::QAR1(H),XS(b)
        • B(a);OGATE,P_SPINB(a),XR(B)::B(A),XB(a)
        • Q(h);N_GUARD::QAR1(H),XQ(h)
        • B(a);N_GUARD::B(A)+R(B),XB(a)
      • Refutation
        • Q(h);CHECK,XQ(H)
    • Try
      • S(E);
      • Vars
        • Q(h);CHECK,N_GUARD::QAB1(H),XQ(h)
        • S(b);CHECK,N_GUARD::S(F),XS(b)
        • S(b);CHECK,N_GUARD::QAR1(H),XS(b)
        • B(a);OGATE,P_SPINB(a),XR(B)::B(A),XB(a)
        • Q(h);N_GUARD::QAR1(H),XQ(h)
        • B(a);N_GUARD::B(A)+R(B),XB(a)
        • S(c);N_GUARD::QAR1(H)
        • S(c);N_GUARD::QAR1(H),XS(c)
      • Refutation
        • Q(h);CHECK,XQ(H)
    • Try
      • S(E);
      • Vars
        • Q(h);CHECK,N_GUARD::QAB1(H),XQ(h)
        • S(b);CHECK,N_GUARD::S(F),XS(b)
        • S(b);CHECK,N_GUARD::QAR1(H),XS(b)
        • B(a);OGATE,P_SPINB(a),XR(B)::B(A),XB(a)
        • Q(h);N_GUARD::QAR1(H),XQ(h)
        • B(a);N_GUARD::B(A)+R(B),XB(a)
      • Refutation
        • Q(h);CHECK,XQ(H)
    • Try
      • S(E);
      • Vars
        • Q(h);CHECK,N_GUARD::QAB1(H),XQ(h)
        • S(b);CHECK,N_GUARD::S(F),XS(b)
        • S(b);CHECK,N_GUARD::QAR1(H),XS(b)
        • B(a);OGATE,P_SPINB(a),XR(B)::B(A),XB(a)
        • Q(h);N_GUARD::QAR1(H),XQ(h)
        • B(a);N_GUARD::B(A)+R(B),XB(a)
      • Refutation
        • Q(h);CHECK,XQ(H)
    • Try
      • B(C);
      • Threat
        • QAB1(H)
      • Vars
        • S(b);CHECK,N_GUARD::S(F),XS(b)
        • S(b);CHECK,N_GUARD::QAR1(H),XS(b)
        • S(c);N_GUARD::QAR1(H)
      • Refutation
        • Q(h);XB(C)
    • Try
      • R(B);P_PINS(c)
      • Threat
        • QAR1(H)
      • Vars
        • Q(h);CHECK,N_GUARD::QAB1(H),XQ(h)
        • S(b);CHECK,N_GUARD::S(F),XS(b)
        • S(b);CHECK,N_GUARD,N_SPINS(c)::QAR1(H),XS(b)
        • Q(h);N_GUARD::QAR1(H),XQ(h)
      • Refutation
        • Q(h);CHECK,XQ(H)
  • Actual
    • S(E);
    • Vars
      • Q(h);CHECK,N_GUARD::QAB1(H),XQ(h)
      • Q(h);CHECK,XQ(H)::S(F),XQ(h)
      • S(b);CHECK,N_GUARD::S(F),XS(b)
      • S(b);CHECK,OGATE,XS(E)::QAR1(H),XS(b)
      • B(a);OGATE,P_SPINB(a),XR(B)::B(A),XB(a)
      • Q(h);N_GUARD::QAR1(H),XQ(h)
      • B(a);N_GUARD::B(A)+R(B),XB(a)
      • S(b);N_GUARD::S(F)
      • S(c);N_GUARD::QAR1(H)
      • S(c);N_GUARD::QAR1(H),XS(c)
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