MESON Chess Problem Database

Problem Display
PID: 240218 (7B/8/1K2QP2/8/2Nkbr1R/1ppN4/3rnP2/8 w - - 0 1)

Cristoffanini, Guido

Tijdschrift vd KNSB, 1928

7B/8/1K2QP2/8/2Nkbr1R/1ppN4/3rnP2/8

#2

8 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf2
      • 2.Qxe4#
    • 1...Rf3
      • 2.Qxe4#
    • 1...Rf5
      • 2.Qxe4#
    • 1...Bxd3
      • 2.f7#
  • Tries
    • 1.Sxf4?
      • threat
        • 2.f7#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Sxf4!
    • 1.Se3?
      • threat
        • 2.Qc4#
      • 1...Kxd3
        • 2.Qc4#
      • 1...Rxf2
        • 2.Qxe4#
      • 1...Rxf6
        • 2.Qd6#
      • 1...Bxd3
        • 2.Qd5#
        • 2.f7#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Rxd3!
    • 1.Sa5?
      • threat
        • 2.Qc4#
      • 1...Rxd3
        • 2.Sxb3#
      • 1...Rxf2
        • 2.Qxe4#
      • 1...Rxf6
        • 2.Qd6#
      • 1...Bxd3
        • 2.Sxb3#
        • 2.Sc6#
        • 2.f7#
      • 1...Bd5
        • 2.Qe3#
      • 1...Kxd3!
    • 1.Sd6?
      • threat
        • 2.Qc4#
      • 1...Rxd3
        • 2.Sb5#
      • 1...Rxf2
        • 2.Qxe4#
      • 1...Bxd3
        • 2.f7#
      • 1...Bd5
        • 2.Qe3#
      • 1...Kxd3!
    • 1.Qd6+?
      • 1...Kxc4
        • 2.Se5#
      • 1...Bd5!
  • Keys
    • 1.Sa3!
      • threat
        • 2.Qc4#
      • 1...Kxd3
        • 2.Qc4#
      • 1...Rxd3
        • 2.Sb5#
      • 1...Rxf2
        • 2.Qxe4#
      • 1...Rxf6
        • 2.Qd6#
      • 1...Bxd3
        • 2.f7#
      • 1...Bd5
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(g);N_GUARD,P_SPINB(f),XP(A)::QAR1(F),XB(f)
    • R(g);N_GUARD,P_SPINB(f)::QAR1(F),XB(f)
    • B(f);P_SPINR(g),SBLOCK,XS(B)::B(H)+P(G)
  • Tries
    • Try
      • S(B);XR(g)
      • Threat
        • B(H)+P(G)
      • Vars
        • B(f);N_GUARD::QAR1(F),XB(f)
      • Refutation
        • S(b);XS(B)
    • Try
      • S(C);
      • Threat
        • QAR1(F)
      • Vars
        • K(e);P-FLIGHT,XS(B)::QAB1(F)
        • R(g);N_GUARD,P_SPINB(f),XP(A)::QAR1(F),XB(f)
        • R(g);P_PINQ(F),P_SPINB(f),P_SPINR(g),XP(G)::QAR2(F)
        • B(f);N_GUARD,P_SPINR(g)::QAR1(F),XB(f)
      • Refutation
        • R(a);XS(B)
    • Try
      • S(C);
      • Threat
        • QAR1(F)
      • Vars
        • R(a);SBLOCK,XS(B)::S(C),XP(c)
        • R(g);N_GUARD,P_SPINB(f),XP(A)::QAR1(F),XB(f)
        • R(g);P_PINQ(F),P_SPINB(f),P_SPINR(g),XP(G)::QAR2(F)
        • B(f);OGATE,P_SPINR(g),SBLOCK::QAB1(F)
      • Refutation
        • K(e);P-FLIGHT,XS(B)
    • Try
      • S(C);
      • Threat
        • QAR1(F)
      • Vars
        • R(a);SBLOCK,XS(B)::S(C)
        • R(g);N_GUARD,P_SPINB(f),XP(A)::QAR1(F),XB(f)
        • B(f);P_SPINR(g),SBLOCK,XS(B)::B(H)+P(G)
        • B(f);OGATE,P_SPINR(g),SBLOCK::QAB1(F)
      • Refutation
        • K(e);P-FLIGHT,XS(B)
    • Try
      • Q(F);CHECK
      • Vars
        • K(e);P-FLIGHT,XS(C)::S(B)
      • Refutation
        • B(f);P_SPINB(f),P_SPINR(g)
  • Actual
    • S(C);
    • Threat
      • QAR1(F)
    • Vars
      • K(e);P-FLIGHT,XS(B)::QAB1(F)
      • R(a);SBLOCK,XS(B)::S(C)
      • R(g);N_GUARD,P_SPINB(f),XP(A)::QAR1(F),XB(f)
      • R(g);P_PINQ(F),P_SPINB(f),P_SPINR(g),XP(G)::QAR2(F)
      • B(f);P_SPINR(g),SBLOCK,XS(B)::B(H)+P(G)
      • B(f);OGATE,P_SPINR(g),SBLOCK::QAB1(F)
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