MESON Chess Problem Database

Problem Display
PID: 203383 (6B1/8/r3P2K/pPNk1p1p/R1Nq4/B5n1/6P1/3Q4 w - - 0 1)

Simkhovich, Froim Markovich

5th HM., Budapesti Sakkor, 1924

6B1/8/r3P2K/pPNk1p1p/R1Nq4/B5n1/6P1/3Q4

#2

10 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qd2+
      • 2.Qxd2#
    • 1...Qd3
      • 2.Qxd3#
    • 1...Rxe6+
      • 2.Bxe6#
    • 1...Ra7
      • 2.e7#
  • Tries
    • 1.Se3+?
      • 1...Ke5
        • 2.Qxd4#
      • 1...Kd6!
    • 1.Sb6+?
      • 1...Ke5
        • 2.Qxd4#
      • 1...Rxb6
        • 2.Qxd4#
      • 1...Kd6!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Sf6#
      • 1...Qd2+
        • 2.Se3#
      • 1...Ke4
        • 2.Qf3#
      • 1...Qxd1
        • 2.Se3#
      • 1...Qd3
        • 2.Se3#
        • 2.Qxd3#
      • 1...Se4
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(b);CHECK,OGATEB::QAR(A),XQ(b)
    • Q(b);OGATEB::QAR2(A),XQ(b)
    • R(g);CHECK,OGATE,P_SPINR(g),XP(H)::B(J),XR(g)
    • R(g);N_PINP(H)::B(J)+P(H)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(d);N_SPINQ(b),P-FLIGHT::QAB1(A),XQ(b)
      • Refutation
        • K(d);N_PINP(H),P-FLIGHT
    • Try
      • S(E);CHECK,N_SPINP(H)
      • Vars
        • K(d);N_SPINQ(b),P-FLIGHT::QAB1(A),XQ(b)
        • R(g);P_PINP(H),XS(E)::QAR1(A),XQ(b)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • Q(b);CHECK::S(E)
      • K(d);N_SPINQ(b),S_FLIGHT::QAB1(A)
      • Q(b);N_SPINQ(b),XQ(A)::S(E)
      • S(a);SBLOCK::S(E)
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