MESON Chess Problem Database

Problem Display
PID: 140594 (3Nn2K/4R2p/1p4N1/3k2r1/2RP4/1p4B1/r2Q4/b1q2B2 w - - 0 1)

Riva, Rodolfo

Comm., Die Schwalbe, 2010

3Nn2K/4R2p/1p4N1/3k2r1/2RP4/1p4B1/r2Q4/b1q2B2

#2

9 + 9

23 Die Schwalbe 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Qxg5#
    • 1...Qa3
      • 2.Qxg5#
    • 1...Qd1
      • 2.Qxg5#
    • 1...Qc3
      • 2.Qxg5#
    • 1...Qxc4
      • 2.Bg2#
    • 1...Ra3
      • 2.Qg2#
    • 1...Ra4
      • 2.Qg2#
    • 1...Ra5
      • 2.Qg2#
    • 1...Ra6
      • 2.Qg2#
    • 1...Ra7
      • 2.Qg2#
    • 1...Ra8
      • 2.Qg2#
    • 1...Bb2
      • 2.Qg2#
    • 1...Bxd4+
      • 2.Qxd4#
    • 1...Sd6
      • 2.Sf4#
    • 1...b2
      • 2.Qg2#
  • Tries
    • 1.Rd7+?
      • 1...Ke4
        • 2.Qd3#
      • 1...Sd6!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qb5#
      • 1...Bxd4+
        • 2.Rxd4#
      • 1...Qxc4
        • 2.Qxc4#
      • 1...Rxg3
        • 2.Re5#
      • 1...Re5
        • 2.Rxe5#
      • 1...Qa3
        • 2.Sf4#
      • 1...Qf4
        • 2.Sxf4#
      • 1...Ra5
        • 2.Bg2#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sc7
        • 2.Qd6#
      • 1...b5
        • 2.Qc5#
        • 2.Qxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 4
    • REMOVED MATES = 10
  • Sets
    • Q(b);N_GUARD::QAR(B),XR(f)
    • Q(b);SBLOCK,XR(D)::B(A)
    • R(c);N_GUARD::QAB(B)
    • B(a);S_CUTR(c)::QAB(B)
    • B(a);CHECK,OGATE,P_SPINB(a),XP(E)::QAR1(B),XB(a)
    • S(i);SBLOCK::S(F)
    • P(d);N_PINP(E),S_CUTR(c)::QAB(B)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB1(B)
      • Refutation
        • S(i);P_SPINS(i)
  • Actual
    • Q(B);
    • Threat
      • QAR2(B)
    • Vars
      • B(a);CHECK,OGATE,XP(E)::R1(D),XB(a)
      • Q(b);OGATE,XR(D)::QAB1(B),XQ(b)
      • R(f);N_GUARD,XB(C)::R1(G)
      • R(f);N_GUARD,N_PINP(E)::R1(G),XR(f)
      • Q(b);N_GUARD::S(F)
      • Q(b);N_GUARD::S(F),XQ(b)
      • R(c);N_GUARD::B(A)
      • S(i);N_GUARD::QAR1(B),XS(i)
      • S(i);N_GUARD::QAR1(B)
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