MESON Chess Problem Database

Problem Display
PID: 275623 (2R1nb2/3K4/1p1p1p2/3kp3/2p1N1R1/2Q5/1B1P4/2r1r3 w - - 0 1)

Serafimovic, Ilya

Sergienko, Andrin

Problemist Ukraini, 20023

2R1nb2/3K4/1p1p1p2/3kp3/2p1N1R1/2Q5/1B1P4/2r1r3

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qxc4#
    • 1...Rb1
      • 2.Qxc4#
    • 1...Rcd1
      • 2.Qxc4#
    • 1...Rxc3
      • 2.Sxc3#
    • 1...Sg7
      • 2.Sxf6#
  • Tries
    • 1.Qa5+?
      • 1...b5
        • 2.Qxb5#
        • 2.Qa8#
      • 1...bxa5!
    • 1.Qa3?
      • threat
        • 2.Qa8#
      • 1...Rc3
        • 2.Sxc3#
      • 1...Ra1
        • 2.Sc3#
      • 1...Sc7
        • 2.Sxf6#
      • 1...c3!
    • 1.Qf3?
      • threat
        • 2.Sc3#
        • 2.Sxf6#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Rc3
        • 2.Sxc3#
        • 2.Sxf6#
      • 1...c3
        • 2.Sxc3#
        • 2.Sxf6#
        • 2.Qd3#
      • 1...f5
        • 2.Sc3#
        • 2.Sf6#
      • 1...Sc7!
    • 1.d3?
      • threat
        • 2.dxc4#
      • 1...Rxc3
        • 2.Sxc3#
      • 1...Rxe4
        • 2.dxe4#
      • 1...cxd3
        • 2.Qxd3#
      • 1...b5!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qb5#
      • 1...Rc3
        • 2.Sxc3#
      • 1...Sc7
        • 2.Sxf6#
      • 1...c3
        • 2.Qc4#
      • 1...b5
        • 2.Qxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(a);N_GUARD::QAB1(C),XP(c)
    • R(a);XQ(C)::S(D),XR(a)
    • S(i);N_GUARD::S(D),XP(h)
  • Tries
    • Try
      • Q(C);CHECK
      • Refutation
        • P(f);XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAB(C)
      • Vars
        • R(a);N_GUARD::S(D),XR(a)
        • R(a);N_GUARD::S(D)
        • S(i);N_GUARD::S(D),XP(h)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);OGATE,P_SPINR(b),XS(D)::QAB1(C),XR(b)
      • Refutation
        • S(i);
    • Try
      • P(B);
      • Threat
        • P(B),XP(c)
      • Vars
        • R(a);XQ(C)::S(D),XR(a)
        • R(b);OGATE,XS(D)::P(B),XR(b)
        • P(c);OGATE,XP(B)::QAR2(C),XP(c)
      • Refutation
        • P(f);
  • Actual
    • Q(C);
    • Threat
      • QAR2(C)
    • Vars
      • R(a);N_GUARD::S(D),XR(a)
      • S(i);N_GUARD::S(D),XP(h)
      • P(c);S_CUTR(a)::QAB1(C)
      • P(f);::QAR2(C),XP(f)
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