MESON Chess Problem Database

Problem Display
PID: 227546 (7B/8/2pN1Qp1/2q2p2/R1B2k2/4N1bP/2K2PP1/5R2 w - - 0 1)

Mari, Alberto

5th Prize, El Ajedrez Argentino, 1926

7B/8/2pN1Qp1/2q2p2/R1B2k2/4N1bP/2K2PP1/5R2

#2

11 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc4+
      • 2.Rxc4#
    • 1...Qb5
      • 2.Bxb5#
    • 1...Qd5
      • 2.Bxd5#
    • 1...Bh2
      • 2.Qh4#
    • 1...Bh4
      • 2.Qxh4#
  • Tries
    • 1.Sd5+?
      • 1...Qxd5
        • 2.Bxd5#
      • 1...cxd5!
    • 1.fxg3+?
      • 1...Kxe3
        • 2.Rf3#
        • 2.Qc3#
      • 1...Kxg3!
    • 1.h4?
      • threat
        • 2.Qg5#
      • 1...Qxc4+
        • 2.Rxc4#
      • 1...Bxh4
        • 2.Qxh4#
      • 1...g5
        • 2.Qxg5#
      • 1...Qxd6!
  • Keys
    • 1.Sexf5!
      • threat
        • 2.fxg3#
      • 1...Qxf2+
        • 2.Be2#
      • 1...Qxc4+
        • 2.Rxc4#
      • 1...Qxf5+
        • 2.Bd3#
      • 1...Qxd6
        • 2.Sxd6#
      • 1...Bxf2
        • 2.Qh4#
      • 1...gxf5
        • 2.Qh6#
      • 1...Bh2
        • 2.Qh4#
      • 1...Bh4
        • 2.Qxh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • Q(c);CHECK,OGATE,P_SPINQ(c),XB(H)::R(G),XQ(c)
    • Q(c);N_PINB(H)::R(G)+B(H),XQ(c)
    • B(a);N_GUARD::QAR2(J)
    • B(a);N_GUARD::QAR2(J),XB(a)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • Q(c);N_PINB(H),XS(E)::R(G)+B(H),XQ(c)
      • Refutation
        • P(e);XS(E)
    • Try
      • P(C);CHECK,XB(a)
      • Refutation
        • K(b);N_SPINP(d),S_FLIGHT,XP(C)
    • Try
      • P(F);
      • Threat
        • QAB1(J)
      • Vars
        • Q(c);CHECK,OGATE,P_SPINQ(c),XB(H)::R(G),XQ(c)
        • B(a);OGATE,XP(F)::QAR2(J),XB(a)
        • P(f);::QAB1(J),XP(f)
      • Refutation
        • Q(c);N_PINB(H),XS(I)
  • Actual
    • S(E);XP(d)
    • Threat
      • R(A)+P(C)DCHECK,XB(a)
    • Vars
      • Q(c);CHECK,N_PINB(H),P_SPINQ(c),XP(C)::R(G)+B(H)
      • Q(c);CHECK,OGATE,P_SPINQ(c),XB(H)::R(G),XQ(c)
      • Q(c);CHECK,N_PINB(H),P_SPINQ(c),XS(E)::R(G)+B(H)
      • Q(c);N_PINB(H),XS(I)::QAR(J)+S(E),XQ(c)
      • B(a);N_GUARD,P_SPINB(a),XP(C)::QAR2(J)
      • P(f);OGATE,P_SPINP(f),XS(E)::QAB(J)
      • B(a);N_GUARD::QAR2(J)
      • B(a);N_GUARD::QAR2(J),XB(a)
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