MESON Chess Problem Database

Problem Display
PID: 197430 (Q2K4/2p2bp1/5p2/1p1Nn3/RPkN2r1/1p2p3/5b2/1B1R4 w - - 0 1)

Shire, David J

The Problemist, 2019

Q2K4/2p2bp1/5p2/1p1Nn3/RPkN2r1/1p2p3/5b2/1B1R4

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4
      • 2.Rc1#
    • 1...Sf3
      • 2.Qc6#
    • 1...Sc6+
      • 2.Qxc6#
    • 1...Sg6
      • 2.Qc6#
    • 1...b2
      • 2.Ba2#
  • Tries
    • 1.Se2?
      • threat
        • 2.Rc1#
      • 1...Sc6+
        • 2.Qxc6#
      • 1...bxa4
        • 2.Qa6#
      • 1...b2
        • 2.Ba2#
      • 1...Rg1
        • 2.Rd4#
      • 1...Be1
        • 2.Sxe3#
      • 1...Sd3
        • 2.Bxd3#
      • 1...c6
        • 2.Sb6#
      • 1...Bg6!
    • 1.Sxb5?
      • threat
        • 2.Sa3#
      • 1...Sc6+
        • 2.Qxc6#
      • 1...Kxb5
        • 2.Qa6#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...Sd3
        • 2.Bxd3#
      • 1...b2!
    • 1.Sc6?
      • threat
        • 2.Sa5#
      • 1...Sxc6+
        • 2.Qxc6#
      • 1...Bxd5
        • 2.Rc1#
      • 1...bxa4
        • 2.Qa6#
      • 1...Sd3!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Rc1#
      • 1...Sc6+
        • 2.Qxc6#
      • 1...bxa4
        • 2.Qa6#
      • 1...b2
        • 2.Ba2#
      • 1...Rg1
        • 2.Rd4#
      • 1...Be1
        • 2.Sfxe3#
      • 1...Sd3
        • 2.Bxd3#
      • 1...c6
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • R(e);P_PINS(F),SBLOCK,XS(E)::R(B)
    • S(g);N_GUARD::QAR2(G)
    • S(g);CHECK,N_GUARD::QAR2(G),XS(g)
    • P(b);OGATEB::B(A)
  • Tries
    • Try
      • S(E);
      • Threat
        • R(B)
      • Vars
        • S(g);CHECK,N_GUARD::QAR2(G),XS(g)
        • P(f);OGATEB,XR(C)::QAB(G)
        • P(b);OGATEB::B(A)
        • R(e);N_GUARD::R1(B)
        • B(a);N_GUARD::S(F),XP(c)
        • S(g);N_GUARD::B(A),XS(g)
        • P(i);N_GUARD::S(F)
      • Refutation
        • B(j);
    • Try
      • S(E);XP(f)
      • Threat
        • S(E)
      • Vars
        • S(g);CHECK,N_GUARD::QAR2(G),XS(g)
        • K(d);OGATEB,S_FLIGHT,XS(E)::QAB1(G)
        • B(j);OGATE,XS(F)::QAB1(G),XB(j)
        • S(g);N_GUARD::B(A),XS(g)
      • Refutation
        • P(b);
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • S(g);CHECK,OGATE,XS(E)::QAR2(G),XS(g)
        • B(j);SBLOCK,XS(F)::R(B)
        • P(f);OGATEB,XR(C)::QAB(G)
      • Refutation
        • S(g);
  • Actual
    • S(E);
    • Threat
      • R(B)
    • Vars
      • S(g);CHECK,N_GUARD::QAR2(G),XS(g)
      • P(f);OGATEB,XR(C)::QAB(G)
      • P(b);OGATEB::B(A)
      • R(e);N_GUARD::R1(B)
      • B(a);N_GUARD::S(E),XP(c)
      • S(g);N_GUARD::B(A),XS(g)
      • P(i);N_GUARD::S(E)
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