MESON Chess Problem Database

Problem Display
PID: 235695 (q2n4/bn3Q2/bp1p4/r7/R4P2/1NRN4/1PP1PK2/3k4 w - - 0 1)

Makaronets, Leonid

Mat, 1973

q2n4/bn3Q2/bp1p4/r7/R4P2/1NRN4/1PP1PK2/3k4

#2

10 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rb5
      • 2.Ra1#
    • 1...Rc5
      • 2.Ra1#
    • 1...Rd5
      • 2.Ra1#
    • 1...Re5
      • 2.Ra1#
    • 1...Rf5
      • 2.Ra1#
    • 1...Rg5
      • 2.Ra1#
    • 1...Rh5
      • 2.Ra1#
  • Tries
    • 1.Qd5?
      • threat
        • 2.Qh1#
      • 1...b5+
        • 2.Sdc5#
      • 1...Rxd5
        • 2.Ra1#
      • 1...Sc5!
    • 1.Qg6?
      • threat
        • 2.Qg1#
      • 1...Rg5
        • 2.Ra1#
      • 1...b5+!
    • 1.Qg8?
      • threat
        • 2.Qg1#
      • 1...Rg5
        • 2.Ra1#
      • 1...b5+!
    • 1.Qg7?
      • threat
        • 2.Qg1#
      • 1...Rg5
        • 2.Ra1#
      • 1...b5+!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qh1#
      • 1...b5+
        • 2.e3#
      • 1...Rxh5
        • 2.Ra1#
      • 1...Rg5
        • 2.Ra1#
      • 1...Sc5
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(b);N_GUARD::R(H)
    • R(b);N_GUARD,P_PINP(I)::R(H)
  • Tries
    • Try
      • Q(J);
      • Threat
        • QAR(J)
      • Vars
        • P(d);CHECK,S_CUTB(c)::QAR(J)+S(G)
        • R(b);N_GUARD,XQ(J)::R(H)
      • Refutation
        • S(g);
    • Try
      • Q(J);
      • Threat
        • QAR(J)
      • Vars
        • R(b);N_GUARD::R(H)
      • Refutation
        • P(d);CHECK
    • Try
      • Q(J);
      • Threat
        • QAR(J)
      • Vars
        • R(b);N_GUARD::R(H)
      • Refutation
        • P(d);CHECK
    • Try
      • Q(J);
      • Threat
        • QAR(J)
      • Vars
        • R(b);N_GUARD::R(H)
      • Refutation
        • P(d);CHECK
  • Actual
    • Q(J);
    • Threat
      • QAR(J)
    • Vars
      • P(d);CHECK,S_CUTR(b)::QAB(J)+P(C)
      • R(b);N_GUARD,XQ(J)::R(H)
      • R(b);N_GUARD::R(H)
      • S(g);S_CUTR(b)::QAB(J)+P(C)
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