MESON Chess Problem Database

Problem Display
PID: 236568 (7n/5p2/2pp1Kp1/P1Np2R1/p1pk4/5P2/B7/2Q5 w - - 0 1)

Makaronets, Leonid

Novi Temi, 1972

7n/5p2/2pp1Kp1/P1Np2R1/p1pk4/5P2/B7/2Q5

#2

7 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc5
      • 2.Qxc4#
    • 1...c3
      • 2.Qg1#
    • 1...dxc5
      • 2.Qd2#
  • Tries
    • 1.Sxa4?
      • threat
        • 2.Qd2#
        • 2.Qc3#
      • 1...c3
        • 2.Qxc3#
      • 1...Kd3!
    • 1.Bxc4?
      • 1...dxc4
        • 2.Qd2#
      • 1...dxc5
        • 2.Rg4#
      • 1...a3
        • 2.Sb3#
      • 1...Kxc5!
    • 1.Rxd5+?
      • 1...Kxd5
        • 2.Qxc4#
      • 1...cxd5!
    • 1.Re5?
      • threat
        • 2.Qe3#
      • 1...Kxc5
        • 2.Qxc4#
      • 1...dxe5!
    • 1.Qb2+?
      • 1...Kxc5
        • 2.Qb6#
      • 1...c3
        • 2.Qf2#
      • 1...Ke3!
    • 1.Qf4+?
      • 1...Kxc5
        • 2.Qxc4#
      • 1...Kc3!
    • 1.Qc3+?
      • 1...Kxc5
        • 2.Qxc4#
      • 1...Kxc3!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qd2#
        • 2.Qc3#
      • 1...Kd3
        • 2.Qd2#
      • 1...dxe4
        • 2.Qd2#
      • 1...c3
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • K(c);P_SPINP(b),S_FLIGHT,XS(E)::QAR1(A),XP(b)
    • P(b);SBLOCK::QAB(A)
    • P(f);SBLOCK,XS(E)::QAR2(A)
  • Tries
    • Try
      • S(E);XP(a)
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAB1(A),XP(b)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • B(B);XP(b)
      • Vars
        • P(d);SBLOCK,XB(B)::QAR2(A)
        • P(f);SBLOCK,XS(E)::R(F)
        • P(a);N_GUARD::S(E)
      • Refutation
        • K(c);P_SPINP(d),S_FLIGHT,XS(E)
    • Try
      • R(F);CHECK,XP(d)
      • Vars
        • K(c);P-FLIGHT,P_SPINP(b),XR(F)::QAB1(A),XP(b)
      • Refutation
        • P(e);XR(F)
    • Try
      • R(F);
      • Threat
        • QAB1(A)
      • Vars
        • K(c);P_SPINP(b),S_FLIGHT,XS(E)::QAR1(A),XP(b)
      • Refutation
        • P(f);XR(F)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATEB,P_SPINP(d),S_FLIGHT,XS(E)::QAB1(A)
        • P(b);P_SPINP(b),SBLOCK::QAB(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATE,P_SPINP(d),S_FLIGHT,XS(E)::QAR1(A),XP(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P_SPINP(b),S_FLIGHT,XS(E)::QAR1(A),XP(b)
      • Refutation
        • K(c);S_FLIGHT,XQ(A)
  • Actual
    • S(E);
    • Threat
      • DUALS(2)
    • Vars
      • K(c);P-FLIGHT::QAR1(A)
      • P(d);XS(E)::QAR2(A)
      • P(b);::QAB1(A),XP(b)
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