MESON Chess Problem Database

Problem Display
PID: 206328 (2NN4/1n5p/6p1/n2k4/5P2/b1R4p/3P1B1K/1Q3b2 w - - 0 1)

Pulcherio, Cauby

2nd Prize, Xeque Mate, 1925

2NN4/1n5p/6p1/n2k4/5P2/b1R4p/3P1B1K/1Q3b2

#2

8 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bg2
      • 2.Qd3#
    • 1...Bd3
      • 2.Qxd3#
    • 1...Bc4
      • 2.Qh1#
    • 1...Bb5
      • 2.Qh1#
    • 1...Ba6
      • 2.Qh1#
    • 1...Bd6
      • 2.Sb6#
    • 1...Sc4
      • 2.Qxb7#
    • 1...Sd6
      • 2.Sb6#
      • 2.Se7#
    • 1...g5
      • 2.Qf5#
  • Tries
    • 1.Rd3+?
      • 1...Kc4
        • 2.Sb6#
      • 1...Bxd3
        • 2.Qxd3#
      • 1...Ke4!
    • 1.Qxg6?
      • threat
        • 2.Sb6#
        • 2.Qf5#
        • 2.Qe6#
      • 1...Sxd8
        • 2.Sb6#
        • 2.Qf5#
      • 1...Bd3
        • 2.Sb6#
        • 2.Qxd3#
        • 2.Qe6#
      • 1...Bc5
        • 2.Qf5#
        • 2.Qe6#
      • 1...Bd6
        • 2.Sb6#
        • 2.Qe6#
      • 1...Sc4
        • 2.Qc6#
        • 2.Qe6#
      • 1...Sc6
        • 2.Sb6#
        • 2.Qxc6#
        • 2.Qe6#
      • 1...Sc5
        • 2.Sb6#
        • 2.Se7#
        • 2.Qf5#
      • 1...Sd6
        • 2.Sb6#
        • 2.Se7#
        • 2.Qe6#
      • 1...hxg6!
    • 1.Qe1?
      • threat
        • 2.Qe5#
        • 2.Qe6#
      • 1...Sxd8
        • 2.Qe5#
      • 1...Bd6
        • 2.Sb6#
        • 2.Qe6#
      • 1...Sc4
        • 2.Qe6#
      • 1...Sc6
        • 2.Qe6#
      • 1...Sc5
        • 2.Qe5#
      • 1...Be2!
    • 1.Qxb7+?
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sxb7!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Qe4#
      • 1...Kxc4
        • 2.Sb6#
      • 1...Bxc4
        • 2.Qh1#
      • 1...Sxc4
        • 2.Qxb7#
      • 1...Bg2
        • 2.Qd3#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Sc5
        • 2.Rd4#
      • 1...Sd6
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD::QAR2(A)
    • B(a);N_GUARD::QAR2(A),XB(a)
    • B(a);OGATE::QAB(A)
    • B(b);P_PINP(F),SBLOCK::S(G)
    • S(d);N_GUARD::QAB(A),XS(g)
    • P(f);N_GUARD::QAR2(A)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(e);S_FLIGHT::S(G)
        • B(a);OGATE,XR(E)::QAR2(A),XB(a)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(A);XP(f)
      • Threat
        • DUALS(3)
      • Refutation
        • P(h);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(g);XS(H)::QAR1(A)
        • S(d);::QAB1(A)
        • S(g);::QAR1(A)
      • Refutation
        • B(a);
    • Try
      • Q(A);CHECK,XS(g)
      • Vars
        • S(d);N_GUARD,P_SPINS(d)::QAB1(A),XS(d)
      • Refutation
        • S(d);XQ(A)
  • Actual
    • R(E);
    • Threat
      • QAB1(A)
    • Vars
      • K(e);S_FLIGHT,XR(E)::S(G)
      • B(a);OGATE,SBLOCK,XR(E)::QAB(A)
      • S(d);N_GUARD,SBLOCK,XR(E)::QAB(A),XS(g)
      • B(a);N_GUARD::QAR2(A)
      • B(a);N_GUARD::QAR2(A),XB(a)
      • S(g);SBLOCK::R1(E)
      • S(g);SBLOCK::S(G)
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