MESON Chess Problem Database

Problem Display
PID: 250011 (2B1Q3/3n2p1/3pRpR1/1p1P1n1K/8/N1Pk4/1P2p3/3qB1N1 w - - 0 1)

Rozijn, DA

Schakend Nederland, 1983

2B1Q3/3n2p1/3pRpR1/1p1P1n1K/8/N1Pk4/1P2p3/3qB1N1

#2

11 + 9

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Rxe3#
    • 1...Sg3+
      • 2.Rxg3#
    • 1...Sd4
      • 2.Re3#
    • 1...Sh4
      • 2.Re3#
    • 1...Sh6
      • 2.Re3#
      • 2.Rg3#
    • 1...Se7
      • 2.Rg3#
    • 1...Sc5
      • 2.Qxb5#
    • 1...Sb8
      • 2.Qxb5#
    • 1...Sf8
      • 2.Qxb5#
    • 1...b4
      • 2.Ba6#
  • Tries
    • 1.Rg3+?
      • 1...Se3
        • 2.Rgxe3#
        • 2.Rexe3#
      • 1...Sxg3+!
  • Keys
    • 1.Rxe2!
      • threat
        • 2.Qe4#
      • 1...Qxe2+
        • 2.Qxe2#
      • 1...Sg3+
        • 2.Rxg3#
      • 1...Qa4
        • 2.Rd2#
      • 1...Se3
        • 2.Qxe3#
      • 1...Se7
        • 2.Rg3#
      • 1...Sc5
        • 2.Qxb5#
      • 1...Se5
        • 2.Bxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • S(e);N_GUARD::R1(H),XS(e)
    • S(e);CHECK,N_GUARD::R(I),XS(e)
    • S(e);N_GUARD::R1(H)
    • S(e);N_GUARD::R(I)
    • S(h);OGATE::QAB(K),XP(d)
    • P(d);OGATEB::B(J)
  • Tries
    • Try
      • R(I);CHECK
      • Refutation
        • S(e);CHECK,XR(I)
  • Actual
    • R(H);P_SPINR(H),XP(b)
    • Threat
      • QAB1(K)
    • Vars
      • Q(a);CHECK,OGATE,XR(H)::QAB1(K),XQ(a)
      • S(e);CHECK,N_GUARD::R(I),XS(e)
      • Q(a);N_PINR(H)::R1(H)
      • S(e);N_GUARD::QAR1(K),XS(e)
      • S(e);N_GUARD::R(I)
      • S(h);OGATE::QAB(K),XP(d)
      • S(h);OGATE::B(J),XS(e)
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