MESON Chess Problem Database

Problem Display
PID: 198797 (7b/p4p2/2R5/1rrN1Q1K/Npk2p2/1p1nP1p1/2b1n3/B1R2B2 w - - 0 1)

Marin y Llovet, Valentin

2nd HM., Spanish National Ty., 1921

7b/p4p2/2R5/1rrN1Q1K/Npk2p2/1p1nP1p1/2b1n3/B1R2B2

#2

9 + 13

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sg1
      • 2.Bxd3#
      • 2.Qxd3#
    • 1...Sc3
      • 2.Sb2#
    • 1...Sd4
      • 2.Sb2#
      • 2.Bxd3#
    • 1...Se5
      • 2.Qe4#
    • 1...fxe3
      • 2.Sxe3#
  • Tries
    • 1.Bxe2?
      • threat
        • 2.Bxd3#
        • 2.Qxd3#
      • 1...Be5
        • 2.Qxd3#
      • 1...b2
        • 2.Qxd3#
      • 1...Bd4
        • 2.Bxd3#
      • 1...Bc3!
    • 1.Qe4+?
      • 1...Sd4
        • 2.Sb2#
        • 2.Bxd3#
      • 1...Bd4!
  • Keys
    • 1.Sc7!
      • threat
        • 2.Qd5#
      • 1...Rxc6
        • 2.Qxb5#
      • 1...Be5
        • 2.Qxf7#
      • 1...Sc3
        • 2.Sb2#
      • 1...Se5
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(b);N_SPINB(a),P_SPINS(d),S_CUTB(m)::S(E)
    • S(d);P_SPINS(b),S_CUTB(m)::QAR2(G)
    • P(h);XP(D)::S(F),XP(h)
  • Tries
    • Try
      • B(C);P_PINS(d),XS(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(m);::QAB1(G),XS(d)
        • P(c);::QAB1(G),XS(d)
        • B(m);::B(C),XS(d)
      • Refutation
        • B(m);N_SPINB(a)
    • Try
      • Q(G);CHECK,P_SPINS(F)
      • Refutation
        • B(m);
  • Actual
    • S(F);P_SPINQ(G)
    • Threat
      • QAB1(G)
    • Vars
      • R(j);N_SPINR(j),XR(I)::QAB1(G),XR(i)
      • B(m);N_PINQ(G)::QAB(G),XP(l)
      • S(b);N_SPINB(a),P_SPINS(d),SBLOCK,S_CUTB(m)::S(E)
      • S(d);N_PINQ(G),P_SPINS(b)::QAR2(G)
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