MESON Chess Problem Database

Problem Display
PID: 202338 (6n1/7p/2P1R2r/4NR2/K2k3r/2p2P2/B1pbpN2/6Qn w - - 0 1)

Mari, Alberto

1st Prize, Good Companions, 1923

6n1/7p/2P1R2r/4NR2/K2k3r/2p2P2/B1pbpN2/6Qn

#2

9 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3+
      • 2.Sfg4#
    • 1...Kc5+
      • 2.Se4#
  • Tries
    • 1.Sd1+?
      • 1...Be3
        • 2.Qxe3#
      • 1...Sf2!
    • 1.Sfg4+?
      • 1...Be3
        • 2.Qxe3#
      • 1...Sf2!
    • 1.Seg4?
      • threat
        • 2.Rd5#
        • 2.Re4#
      • 1...Rxg4
        • 2.Rd5#
      • 1...Rxe6
        • 2.Rd5#
      • 1...Sxf2
        • 2.Rd5#
      • 1...e1Q
        • 2.Rd5#
      • 1...e1R
        • 2.Rd5#
      • 1...R4h5
        • 2.Re4#
      • 1...R6h5
        • 2.Re4#
        • 2.Rd6#
      • 1...Sg3
        • 2.Rd5#
      • 1...Se7
        • 2.Re4#
      • 1...Sf6!
    • 1.Rd6+?
      • 1...Ke3+
        • 2.Sfg4#
      • 1...Kc5+
        • 2.Se4#
        • 2.Sc4#
      • 1...Rxd6!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qa7#
      • 1...Ke3+
        • 2.Seg4#
      • 1...Kc5+
        • 2.Sc4#
      • 1...Se7
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(f);CHECK,S_FLIGHT::QAB(A)+S(C),DCHECK
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAB1(A),XB(c)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • S(C);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAB1(A),XB(c)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • R(g);XS(F)::R1(G)
        • R(h);XR(I)::R1(G)
        • S(a);P_SPINS(a),XS(C)::R1(G)
        • P(d);::R1(G)
        • R(g);::R1(I)
        • S(a);::R1(G)
        • S(j);::R1(I)
      • Refutation
        • S(j);
    • Try
      • R(I);CHECK
      • Vars
        • K(f);CHECK,S_FLIGHT::QAB(A)+S(C),DCHECK
      • Refutation
        • R(h);XR(I)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • K(f);CHECK,S_FLIGHT::R(I)+S(F),DCHECK
      • K(f);CHECK,S_FLIGHT::R(G)+S(F)
      • S(j);N_GUARD::QAB(A)+S(F)
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Developed and maintained by Brian Stephenson.
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