MESON Chess Problem Database

Problem Display
PID: 224679 (4B3/5K2/2pR4/4p3/1nk1p3/B1N1P3/nQ1P4/8 w - - 0 1)

Ernst, Heinrich

The Sunny South, 1887

4B3/5K2/2pR4/4p3/1nk1p3/B1N1P3/nQ1P4/8

#2

8 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Rxc6#
    • 1...Sc1
      • 2.Qxb4#
    • 1...Sxc3
      • 2.Qxb4#
    • 1...Sc2
      • 2.Qxa2#
    • 1...Sd3
      • 2.Qxa2#
    • 1...Sa6
      • 2.Qxa2#
    • 1...c5
      • 2.Bb5#
  • Tries
    • 1.Ke6?
      • 1...Kc5
        • 2.Rxc6#
      • 1...Sxc3
        • 2.Qxb4#
      • 1...Sc1
        • 2.Qxb4#
      • 1...Sc2
        • 2.Qxa2#
      • 1...Sd3
        • 2.Qxa2#
      • 1...Sa6
        • 2.Qxa2#
      • 1...c5
        • 2.Bb5#
      • 1...Sd5!
    • 1.Kf6?
      • 1...Kc5
        • 2.Rxc6#
      • 1...Sxc3
        • 2.Qxb4#
      • 1...Sc1
        • 2.Qxb4#
      • 1...Sc2
        • 2.Bf7#
        • 2.Qxa2#
      • 1...Sd3
        • 2.Bf7#
        • 2.Qxa2#
      • 1...Sa6
        • 2.Bf7#
        • 2.Qxa2#
      • 1...c5
        • 2.Bb5#
      • 1...Sd5+!
    • 1.Kg6?
      • 1...Kc5
        • 2.Rxc6#
      • 1...Sxc3
        • 2.Qxb4#
      • 1...Sc1
        • 2.Qxb4#
      • 1...Sc2
        • 2.Bf7#
        • 2.Qxa2#
      • 1...Sd3
        • 2.Bf7#
        • 2.Qxa2#
      • 1...Sa6
        • 2.Bf7#
        • 2.Qxa2#
      • 1...c5
        • 2.Bb5#
      • 1...Sd5!
    • 1.Ke7?
      • 1...Kc5
        • 2.Rxc6#
      • 1...Sxc3
        • 2.Qxb4#
      • 1...Sc1
        • 2.Qxb4#
      • 1...Sc2
        • 2.Bf7#
        • 2.Qxa2#
      • 1...Sd3
        • 2.Bf7#
        • 2.Qxa2#
      • 1...Sa6
        • 2.Bf7#
        • 2.Qxa2#
      • 1...c5
        • 2.Bb5#
      • 1...Sd5+!
    • 1.Kg7?
      • 1...Kc5
        • 2.Rxc6#
      • 1...Sxc3
        • 2.Qxb4#
      • 1...Sc1
        • 2.Qxb4#
      • 1...Sc2
        • 2.Bf7#
        • 2.Qxa2#
      • 1...Sd3
        • 2.Bf7#
        • 2.Qxa2#
      • 1...Sa6
        • 2.Bf7#
        • 2.Qxa2#
      • 1...c5
        • 2.Bb5#
      • 1...Sd5!
    • 1.Kf8?
      • 1...Kc5
        • 2.Rxc6#
      • 1...Sxc3
        • 2.Qxb4#
      • 1...Sc1
        • 2.Qxb4#
      • 1...Sc2
        • 2.Bf7#
        • 2.Qxa2#
      • 1...Sd3
        • 2.Bf7#
        • 2.Qxa2#
      • 1...Sa6
        • 2.Bf7#
        • 2.Qxa2#
      • 1...c5
        • 2.Bb5#
      • 1...Sd5!
    • 1.Kg8?
      • 1...Kc5
        • 2.Rxc6#
      • 1...Sxc3
        • 2.Qxb4#
      • 1...Sc1
        • 2.Qxb4#
      • 1...Sc2
        • 2.Bf7#
        • 2.Qxa2#
      • 1...Sd3
        • 2.Bf7#
        • 2.Qxa2#
      • 1...Sa6
        • 2.Bf7#
        • 2.Qxa2#
      • 1...c5
        • 2.Bb5#
      • 1...Sd5!
    • 1.Bxc6?
      • 1...Sxc3
        • 2.Qxc3#
        • 2.Qxb4#
      • 1...Sxc6
        • 2.Qxa2#
        • 2.Qb5#
      • 1...Sd5
        • 2.Bb5#
        • 2.Qb5#
      • 1...Sc1
        • 2.Qxb4#
      • 1...Sc2
        • 2.Bb5#
        • 2.Qxa2#
        • 2.Qb5#
      • 1...Sd3
        • 2.Bb5#
        • 2.Bd5#
        • 2.Qxa2#
        • 2.Qb5#
      • 1...Sa6
        • 2.Bb5#
        • 2.Qxa2#
        • 2.Qb5#
      • 1...Kc5!
    • 1.Bd7?
      • 1...Kc5
        • 2.Rxc6#
      • 1...Sxc3
        • 2.Qxb4#
      • 1...Sc1
        • 2.Qxb4#
      • 1...Sc2
        • 2.Be6#
        • 2.Qxa2#
      • 1...Sd3
        • 2.Be6#
        • 2.Qxa2#
      • 1...Sa6
        • 2.Be6#
        • 2.Qxa2#
      • 1...c5
        • 2.Bb5#
      • 1...Sd5!
    • 1.Rxc6+?
      • 1...Sxc6
        • 2.Qb5#
      • 1...Kd3!
    • 1.Qxa2+?
      • 1...Kc5
        • 2.Rxc6#
      • 1...Sxa2!
    • 1.Qb3+?
      • 1...Kc5
        • 2.Rxc6#
      • 1...Kxb3!
  • Keys
    • 1.Qb1!
      • 1...Kc5
        • 2.Rxc6#
      • 1...Sxc3
        • 2.Qxb4#
      • 1...Sd5
        • 2.Rxc6#
      • 1...Sc1
        • 2.Qxb4#
      • 1...Sc2
        • 2.Qxa2#
      • 1...Sd3
        • 2.Qxa2#
      • 1...Sa6
        • 2.Qxa2#
      • 1...c5
        • 2.Bb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT,P_SPINS(b)::R1(F),XP(f)
    • S(a);N_GUARD::QAR1(A),XS(b)
    • S(a);N_GUARD,XS(D)::QAR1(A),XS(b)
    • S(b);N_GUARD::QAB(A),XS(a)
    • P(f);OGATE,SBLOCK::B(H)
  • Tries
    • Try
      • K(G);S_FLIGHT
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::R1(F),XP(f)
        • S(a);N_GUARD,XS(D)::QAR1(A),XS(b)
        • S(a);N_GUARD::QAR1(A),XS(b)
        • S(b);N_GUARD::QAB(A),XS(a)
        • P(f);OGATE,SBLOCK::B(H)
      • Refutation
        • S(b);
    • Try
      • K(G);P-FLIGHT
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::R1(F),XP(f)
        • S(a);N_GUARD,XS(D)::QAR1(A),XS(b)
        • S(a);N_GUARD::QAR1(A),XS(b)
        • P(f);OGATE,SBLOCK::B(H)
      • Refutation
        • S(b);CHECK
    • Try
      • K(G);S_FLIGHT
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::R1(F),XP(f)
        • S(a);N_GUARD,XS(D)::QAR1(A),XS(b)
        • S(a);N_GUARD::QAR1(A),XS(b)
        • P(f);OGATE,SBLOCK::B(H)
      • Refutation
        • S(b);
    • Try
      • K(G);P-FLIGHT
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::R1(F),XP(f)
        • S(a);N_GUARD,XS(D)::QAR1(A),XS(b)
        • S(a);N_GUARD::QAR1(A),XS(b)
        • P(f);OGATE,SBLOCK::B(H)
      • Refutation
        • S(b);CHECK
    • Try
      • K(G);P-FLIGHT
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::R1(F),XP(f)
        • S(a);N_GUARD,XS(D)::QAR1(A),XS(b)
        • S(a);N_GUARD::QAR1(A),XS(b)
        • P(f);OGATE,SBLOCK::B(H)
      • Refutation
        • S(b);
    • Try
      • K(G);P-FLIGHT
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::R1(F),XP(f)
        • S(a);N_GUARD,XS(D)::QAR1(A),XS(b)
        • S(a);N_GUARD::QAR1(A),XS(b)
        • P(f);OGATE,SBLOCK::B(H)
      • Refutation
        • S(b);
    • Try
      • K(G);S_FLIGHT
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::R1(F),XP(f)
        • S(a);N_GUARD,XS(D)::QAR1(A),XS(b)
        • S(a);N_GUARD::QAR1(A),XS(b)
        • P(f);OGATE,SBLOCK::B(H)
      • Refutation
        • S(b);
    • Try
      • B(H);XP(f)
      • Vars
        • S(a);N_GUARD::QAR1(A),XS(b)
      • Refutation
        • K(c);P-FLIGHT,P_SPINS(b)
    • Try
      • B(H);
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::R1(F),XP(f)
        • S(a);N_GUARD,XS(D)::QAR1(A),XS(b)
        • S(a);N_GUARD::QAR1(A),XS(b)
        • P(f);OGATE,SBLOCK::B(H)
      • Refutation
        • S(b);
    • Try
      • R(F);CHECK,XP(f)
      • Vars
        • S(b);OGATE,XR(F)::QAB1(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK,XS(a)
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::R1(F),XP(f)
      • Refutation
        • S(b);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::R1(F),XP(f)
      • Refutation
        • K(c);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(c);P-FLIGHT,P_SPINS(b)::R1(F),XP(f)
      • S(a);N_GUARD,XS(D)::QAR1(A),XS(b)
      • S(b);N_GUARD::R(F),XP(f)
      • S(a);N_GUARD::QAR1(A),XS(b)
      • S(b);N_GUARD::QAB(A),XS(a)
      • P(f);OGATE,SBLOCK::B(H)
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