MESON Chess Problem Database

Problem Display
PID: 173668 (8/8/6p1/2p3B1/p1P2rn1/R2qk1N1/BQ3nP1/1N1RK3 w - - 0 1)

Boros, Sandor

L'Alfiere di Re, 1925

8/8/6p1/2p3B1/p1P2rn1/R2qk1N1/BQ3nP1/1N1RK3

#2

10 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa3
      • 2.Qd2#
      • 2.Qe2#
    • 1...Qb3
      • 2.Qc1#
      • 2.Qd2#
      • 2.Qe2#
    • 1...Qc3+
      • 2.Qd2#
    • 1...Sh1
      • 2.Rdxd3#
      • 2.Raxd3#
    • 1...Sh3
      • 2.Rdxd3#
      • 2.Raxd3#
    • 1...Se4
      • 2.Sf1#
      • 2.Rdxd3#
      • 2.Raxd3#
    • 1...Sh2
      • 2.Qxf2#
    • 1...Se5
      • 2.Qxf2#
    • 1...Sf6
      • 2.Qxf2#
    • 1...Sh6
      • 2.Qxf2#
  • Tries
    • 1.Qe5+?
      • 1...Se4
        • 2.Sf1#
        • 2.Bxf4#
        • 2.Rdxd3#
        • 2.Raxd3#
        • 2.Qxe4#
      • 1...Sxe5!
    • 1.Qc2?
      • 1...Qc3+
        • 2.Qd2#
      • 1...Qxa3
        • 2.Sf1#
        • 2.Qd2#
        • 2.Qe2#
      • 1...Sxd1
        • 2.Rxd3#
        • 2.Qxd3#
      • 1...Sh2
        • 2.Qxf2#
      • 1...Qb3
        • 2.Sf1#
        • 2.Qc1#
        • 2.Qd2#
        • 2.Qe2#
      • 1...Sh1
        • 2.Rdxd3#
        • 2.Raxd3#
        • 2.Qxd3#
      • 1...Sh3
        • 2.Rdxd3#
        • 2.Raxd3#
        • 2.Qxd3#
      • 1...Se4
        • 2.Rdxd3#
        • 2.Raxd3#
        • 2.Qxd3#
      • 1...Se5
        • 2.Qxf2#
      • 1...Sf6
        • 2.Qxf2#
      • 1...Sh6
        • 2.Qxf2#
      • 1...Kd4!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Sd5#
      • 1...Qf1+
        • 2.Sxf1#
      • 1...Qe2+
        • 2.Qxe2#
      • 1...Qxd1+
        • 2.Sxd1#
      • 1...Qd2+
        • 2.Qxd2#
      • 1...Qxc3+
        • 2.Qd2#
      • 1...Kd4
        • 2.Sd5#
      • 1...Qd5
        • 2.Sxd5#
        • 2.Sf1#
        • 2.Qe2#
      • 1...Sf6
        • 2.Qxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • Q(b);CHECK::QAB1(E)
    • S(f);N_GUARD::QAB1(E),XS(a)
  • Tries
    • Try
      • Q(E);CHECK
      • Refutation
        • S(f);XQ(E)
    • Try
      • Q(E);
      • Vars
        • Q(b);CHECK::QAB1(E)
        • S(f);N_GUARD::QAB1(E),XS(a)
      • Refutation
        • K(c);N_SPINR(e),S_FLIGHT
  • Actual
    • S(A);N_PINQ(b)
    • Threat
      • S(A)
    • Vars
      • Q(b);CHECK,N_GUARD::S(H),XQ(b)
      • Q(b);CHECK,N_GUARD::QAR1(E),XQ(b)
      • Q(b);CHECK,XR(B)::R(G)+S(A),DCHECK,XQ(b)
      • Q(b);CHECK,N_GUARD::QAB1(E),XQ(b)
      • Q(b);CHECK,N_GUARD,P_SPINQ(b),XS(A)::QAB1(E)
      • K(c);N_SPINR(e),P_SPINQ(b),S_FLIGHT::QAB(E)+S(A)
      • S(f);N_GUARD::QAB1(E),XS(a)
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