MESON Chess Problem Database

Problem Display
PID: 198634 (b5r1/8/1R2r3/1pNB4/4p3/5kBQ/2K2P1p/2N5 w - - 0 1)

Belli, Nicolo

Good Companions, 1921

b5r1/8/1R2r3/1pNB4/4p3/5kBQ/2K2P1p/2N5

#2

8 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.Bxe4#
    • 1...Rf6
      • 2.Rxf6#
    • 1...Re7
      • 2.Rf6#
    • 1...Ree8
      • 2.Rf6#
    • 1...Rxg3
      • 2.Qxg3#
  • Tries
    • 1.Sxe6?
      • threat
        • 2.Sd4#
      • 1...Rxg3
        • 2.Qxg3#
      • 1...Rc8+!
    • 1.Bxh2+?
      • 1...Rg3
        • 2.Qxg3#
      • 1...Kxf2!
    • 1.Bh4+?
      • 1...Rg3
        • 2.Qxg3#
      • 1...Kf4!
    • 1.Be5+?
      • 1...Rg3
        • 2.Qxg3#
      • 1...Kxf2!
    • 1.Bd6+?
      • 1...Rg3
        • 2.Qxg3#
      • 1...Kxf2!
    • 1.Bc7+?
      • 1...Rg3
        • 2.Qxg3#
      • 1...Kxf2!
    • 1.Bb8+?
      • 1...Rg3
        • 2.Qxg3#
      • 1...Kxf2!
    • 1.Bc4?
      • threat
        • 2.Be2#
      • 1...Rxg3
        • 2.Qxg3#
      • 1...bxc4!
  • Keys
    • 1.Sxe4!
      • threat
        • 2.Sd2#
        • 2.Sg5#
      • 1...Rc6+
        • 2.Sc3#
        • 2.Sc5#
      • 1...Rc8+
        • 2.Bc7#
      • 1...Rxe4
        • 2.Rf6#
      • 1...Rxg3
        • 2.Qxg3#
      • 1...Bxd5
        • 2.Sd2#
      • 1...Rg5
        • 2.Sd2#
        • 2.Sxg5#

This is a version of 100848

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(e);N_GUARD,P_PINS(F),S_CUTB(f)::B(G),XP(c)
    • R(e);OGATE::R(H),XR(e)
    • R(e);OGATE::R(H)
    • R(g);OGATE,P_SPINR(g),XB(D)::QAR1(E),XR(g)
  • Tries
    • Try
      • S(F);XR(e)
      • Threat
        • S(F)
      • Vars
        • R(g);OGATE,P_SPINR(g),XB(D)::QAR1(E),XR(g)
      • Refutation
        • R(g);CHECK
    • Try
      • B(D);CHECK,XP(a)
      • Vars
        • R(g);N_GUARD,P_SPINR(g)::QAR1(E),XR(g)
      • Refutation
        • K(b);N_SPINP(c),P-FLIGHT,XP(C)
    • Try
      • B(D);CHECK
      • Vars
        • R(g);N_GUARD,P_SPINR(g)::QAR1(E),XR(g)
      • Refutation
        • K(b);N_SPINP(c),P-FLIGHT
    • Try
      • B(D);CHECK
      • Vars
        • R(g);N_GUARD,P_SPINR(g)::QAR1(E),XR(g)
      • Refutation
        • K(b);N_SPINP(c),P-FLIGHT,XP(C)
    • Try
      • B(D);CHECK
      • Vars
        • R(g);N_GUARD,P_SPINR(g)::QAR1(E),XR(g)
      • Refutation
        • K(b);N_SPINP(c),P-FLIGHT,XP(C)
    • Try
      • B(D);CHECK
      • Vars
        • R(g);N_GUARD,P_SPINR(g)::QAR1(E),XR(g)
      • Refutation
        • K(b);N_SPINP(c),P-FLIGHT,XP(C)
    • Try
      • B(D);CHECK
      • Vars
        • R(g);N_GUARD,P_SPINR(g)::QAR1(E),XR(g)
      • Refutation
        • K(b);N_SPINP(c),P-FLIGHT,XP(C)
    • Try
      • B(G);N_PINP(c)
      • Threat
        • B(G)
      • Vars
        • R(g);OGATE,P_SPINR(g),XB(D)::QAR1(E),XR(g)
      • Refutation
        • P(d);XB(G)
  • Actual
    • S(F);XP(c)
    • Threat
      • DUALS(2)
    • Vars
      • R(g);CHECK,N_GUARD::QAR(E)+B(D)
      • R(e);OGATE,P_SPINR(e),XS(F)::R(H)
      • R(g);OGATE,P_SPINR(g),XB(D)::QAR1(E),XR(g)
      • B(f);XB(G)::S(F)
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