MESON Chess Problem Database

Problem Display
PID: 233214 (b6n/8/p3NK1p/8/Q3R2p/3p1kp1/6p1/3N1nrq w - - 0 1)

Makaronets, Leonid

Freie Presse, 1974

b6n/8/p3NK1p/8/Q3R2p/3p1kp1/6p1/3N1nrq

#2

5 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Re3#
    • 1...Sh2
      • 2.Re3#
    • 1...Se3
      • 2.Rxe3#
    • 1...h5
      • 2.Sg5#
  • Tries
    • 1.Kf5?
      • threat
        • 2.Sd4#
      • 1...Bxe4+
        • 2.Qxe4#
      • 1...Se3+
        • 2.Rxe3#
      • 1...Qh3+!
    • 1.Re1?
      • threat
        • 2.Qf4#
      • 1...Be4
        • 2.Qxe4#
      • 1...Sg6!
    • 1.Re5?
      • threat
        • 2.Qf4#
      • 1...Be4
        • 2.Qxe4#
      • 1...Se3
        • 2.Rxe3#
      • 1...Sg6!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Sd4#
      • 1...Kxe4
        • 2.Qxa8#
      • 1...Bxe4
        • 2.Qh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(a);N_GUARD::R1(C)
    • S(a);N_GUARD::R1(C),XS(a)
    • P(j);N_GUARD::S(D)
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Threat
        • S(D)
      • Vars
        • B(k);CHECK,OGATE,XR(C)::QAB1(B),XB(k)
        • S(a);CHECK,N_GUARD::R1(C),XS(a)
      • Refutation
        • Q(c);CHECK
    • Try
      • R(C);
      • Threat
        • QAR1(B)
      • Vars
        • B(k);N_GUARD::QAB1(B),XB(k)
      • Refutation
        • S(l);
    • Try
      • R(C);
      • Threat
        • QAR1(B)
      • Vars
        • B(k);N_GUARD::QAB1(B),XB(k)
        • S(a);N_GUARD::R1(C),XS(a)
      • Refutation
        • S(l);
  • Actual
    • Q(B);
    • Threat
      • S(D)
    • Vars
      • K(f);OGATEB,S_FLIGHT,XR(C)::QAB(B),XB(k)
      • B(k);SBLOCK,XR(C)::QAB(B)
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