MESON Chess Problem Database

Problem Display
PID: 189748 (6B1/n7/7R/rpk5/qN1N2K1/1PB2P2/3n2p1/2Q2bb1 w - - 0 1)

Novis Filho, Mario

4th Prize, Budapesti Sakkor, 1912

6B1/n7/7R/rpk5/qN1N2K1/1PB2P2/3n2p1/2Q2bb1

#2

9 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bd3
      • 2.Sxd3#
    • 1...Sb1
      • 2.Qg5#
    • 1...Sxb3
      • 2.Qg5#
    • 1...Sc6
      • 2.Rxc6#
    • 1...Sc8
      • 2.Rc6#
  • Tries
    • 1.Bb2+?
      • 1...Kxb4
        • 2.Qc3#
      • 1...Bc4
        • 2.Sd3#
      • 1...Sc4!
    • 1.Bxd2+?
      • 1...Kxd4
        • 2.Qc3#
      • 1...Bc4!
    • 1.Qa3?
      • threat
        • 2.Sd3#
        • 2.Sa6#
      • 1...Qxb4
        • 2.Qxb4#
      • 1...Sc6
        • 2.Rxc6#
      • 1...Ra6
        • 2.Sd3#
        • 2.Sxa6#
      • 1...Bd3
        • 2.Sxd3#
        • 2.Sa6#
      • 1...Qxa3!
  • Keys
    • 1.Se2!
      • threat
        • 2.Bxd2#
      • 1...Qxb4+
        • 2.Bd4#
      • 1...Qxb3
        • 2.Sd3#
      • 1...Bxe2
        • 2.Qxg1#
      • 1...Sxb3
        • 2.Qg5#
      • 1...Sxf3
        • 2.Be1#
        • 2.Bd2#
      • 1...Sc6
        • 2.Rxc6#
      • 1...Qa1
        • 2.Sd3#
      • 1...Qa2
        • 2.Sd3#
      • 1...Qa3
        • 2.Sd3#
      • 1...Bd4
        • 2.Sd3#
      • 1...Sb1
        • 2.Qg5#
      • 1...Sc4
        • 2.Sd3#
      • 1...Se4
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD::S(E),XB(a)
    • S(c);OGATE::QAR(A)
    • S(c);OGATE,XP(B)::QAR(A)
    • S(i);N_GUARD::R1(H),XS(i)
    • S(i);N_GUARD::R1(H)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • K(h);S_FLIGHT,XS(E)::QAB1(A)
        • B(a);P_SPINB(a)::S(E)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • B(C);CHECK,XS(c)
      • Vars
        • K(h);S_FLIGHT,XS(F)::QAB1(A)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(e);OGATE,P_PINS(F),P_SPINQ(e),XS(E)::QAB1(A),XQ(e)
        • S(i);N_GUARD::R1(H),XS(i)
      • Refutation
        • Q(e);XQ(A)
  • Actual
    • S(F);P_SPINS(E)
    • Threat
      • QAR(A)+B(C),XS(c)
    • Vars
      • Q(e);CHECK,SBLOCK,XS(E)::QAR(A)+B(C),DCHECK
      • Q(e);N_PINS(E),XP(B)::S(E)
      • B(a);OGATE,P_PINP(D),XS(F)::QAB(A),XB(b)
      • S(c);OGATE,XP(B)::QAR(A)
      • S(i);N_GUARD::R1(H),XS(i)
      • Q(e);N_PINS(E)::S(E)
      • B(b);N_PINS(E)::S(E)
      • S(c);OGATE::QAR(A)
      • S(c);N_PINS(E)::S(E)
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