MESON Chess Problem Database

Problem Display
PID: 101297 (1bB2n2/8/1Q5p/2p1k1qR/2PNp3/2p1P3/3RNKb1/8 w - - 0 1)

Wilhelm, Joseph A

Good Companions, 1920

1bB2n2/8/1Q5p/2p1k1qR/2PNp3/2p1P3/3RNKb1/8

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5+
      • 2.Rxf5#
    • 1...Se6
      • 2.Qxe6#
    • 1...Sg6
      • 2.Qe6#
    • 1...Sd7
      • 2.Qe6#
    • 1...Sh7
      • 2.Qe6#
    • 1...cxd4
      • 2.Qxd4#
      • 2.exd4#
  • Tries
    • 1.Sc2?
      • threat
        • 2.Rd5#
      • 1...Qf5+
        • 2.Rxf5#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Se6
        • 2.Qxe6#
      • 1...cxd2!
    • 1.Sb3?
      • threat
        • 2.Rd5#
      • 1...Qf5+
        • 2.Rxf5#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Se6
        • 2.Qxe6#
      • 1...cxd2!
    • 1.Sf3+?
      • 1...Bxf3
        • 2.Rd5#
      • 1...exf3!
    • 1.Sb5?
      • threat
        • 2.Rd5#
      • 1...Qf5+
        • 2.Rxf5#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Se6
        • 2.Qxe6#
      • 1...cxd2!
    • 1.Qd8?
      • threat
        • 2.Sc6#
      • 1...Qf5+
        • 2.Rxf5#
      • 1...cxd4
        • 2.Qxd4#
        • 2.exd4#
      • 1...Sd7
        • 2.Qe7#
      • 1...Se6!
    • 1.Qg6?
      • threat
        • 2.Sc6#
      • 1...Qf5+
        • 2.Rxf5#
      • 1...cxd4
        • 2.exd4#
      • 1...Sxg6!
    • 1.Qxh6?
      • threat
        • 2.Sc6#
        • 2.Rxg5#
      • 1...Qf5+
        • 2.Rxf5#
      • 1...Qxh5
        • 2.Sc6#
        • 2.Qf4#
      • 1...cxd4
        • 2.Rxg5#
        • 2.exd4#
      • 1...Se6
        • 2.Qxe6#
      • 1...Bh3
        • 2.Sc6#
      • 1...Sd7
        • 2.Rxg5#
        • 2.Qe6#
      • 1...Sh7
        • 2.Sc6#
        • 2.Qe6#
      • 1...Sg6!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Rd5#
      • 1...Qxe3+
        • 2.Sxe3#
      • 1...Qf4+
        • 2.exf4#
      • 1...Qh4+
        • 2.Sxh4#
      • 1...Qg3+
        • 2.Sfxg3#
      • 1...Qxf5+
        • 2.Rxf5#
      • 1...cxd2
        • 2.Qb2#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Se6
        • 2.Qxe6#
      • 1...Qd8
        • 2.Se7#
      • 1...Qg8
        • 2.Sg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 3
  • Sets
    • Q(f);CHECK,OGATE::R1(G),XQ(f)
    • S(i);N_GUARD::QAR1(H),XS(i)
    • S(i);N_GUARD::QAR1(H)
  • Tries
    • Try
      • S(F);
      • Threat
        • R1(A)
      • Vars
        • Q(f);CHECK,OGATE::R1(G),XQ(f)
        • B(h);N_GUARD::QAB1(H),XB(h)
        • S(i);N_GUARD::QAR1(H),XS(i)
      • Refutation
        • P(b);XR(A)
    • Try
      • S(F);
      • Threat
        • R1(A)
      • Vars
        • Q(f);CHECK,OGATE::R1(G),XQ(f)
        • B(h);N_GUARD::QAB1(H),XB(h)
        • S(i);N_GUARD::QAR1(H),XS(i)
      • Refutation
        • P(b);XR(A)
    • Try
      • S(F);CHECK
      • Vars
        • B(a);XS(F)::R1(A)
      • Refutation
        • P(c);XS(F)
    • Try
      • S(F);
      • Threat
        • R1(A)
      • Vars
        • Q(f);CHECK,OGATE::R1(G),XQ(f)
        • B(h);N_GUARD::QAB1(H),XB(h)
        • S(i);N_GUARD::QAR1(H),XS(i)
      • Refutation
        • P(b);XR(A)
    • Try
      • Q(H);
      • Threat
        • S(F)
      • Vars
        • Q(f);CHECK,OGATE::R1(G),XQ(f)
        • S(i);N_GUARD::QAR2(H)
      • Refutation
        • S(i);
    • Try
      • Q(H);
      • Threat
        • S(F)
      • Vars
        • Q(f);CHECK,OGATE::R1(G),XQ(f)
        • P(d);OGATE,XS(F)::P(D),XP(d)
      • Refutation
        • S(i);XQ(H)
    • Try
      • Q(H);XP(g)
      • Threat
        • DUALS(2)
      • Vars
        • Q(f);CHECK,OGATE::R1(G),XQ(f)
        • S(i);N_GUARD::QAR1(H),XS(i)
        • B(a);::S(F)
      • Refutation
        • S(i);
  • Actual
    • S(F);N_PINQ(f)
    • Threat
      • R1(A)
    • Vars
      • Q(f);CHECK,XP(D)::R(G)+S(F),XQ(f)
      • Q(f);CHECK,OGATE::P(D),XQ(f)
      • Q(f);CHECK::R(G)+S(F),XQ(f)
      • Q(f);CHECK,OGATE,P_SPINQ(f),XS(F)::R1(G),XQ(f)
      • P(b);OGATEB,XR(A)::QAB(H)
      • B(h);N_GUARD::QAB1(H),XB(h)
      • S(i);N_GUARD::QAR1(H),XS(i)
      • Q(f);::R(G)+S(F)
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