MESON Chess Problem Database

Problem Display
PID: 225438 (Q7/1Nq1p2p/1p1p1P1p/2pr3R/4k2P/5NP1/5PK1/3R4 w - - 0 1)

Cuppini, Alessandro

Praca, 2001

Q7/1Nq1p2p/1p1p1P1p/2pr3R/4k2P/5NP1/5PK1/3R4

#2

10 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd1
      • 2.Sxc5#
    • 1...Rd2
      • 2.Sxc5#
    • 1...Rd3
      • 2.Sxc5#
      • 2.Sxd6#
    • 1...Rd4
      • 2.Sxc5#
      • 2.Sxd6#
    • 1...Re5
      • 2.Sxc5#
      • 2.Sxd6#
    • 1...Rf5
      • 2.Sxc5#
      • 2.Sxd6#
    • 1...Rg5
      • 2.Sxd6#
    • 1...Rxh5
      • 2.Sxd6#
  • Tries
    • 1.Sxc5+?
      • 1...bxc5
        • 2.Qxd5#
      • 1...dxc5
        • 2.Qxd5#
      • 1...Qxc5!
    • 1.Sxd6+?
      • 1...exd6
        • 2.Qxd5#
      • 1...Qxd6!
    • 1.Rd4+?
      • 1...Rxd4
        • 2.Sxc5#
      • 1...cxd4!
    • 1.Re5+?
      • 1...Rxe5
        • 2.Sxd6#
      • 1...dxe5!
    • 1.Qa2?
      • threat
        • 2.Qxd5#
        • 2.Qe2#
      • 1...Qxb7
        • 2.Qe2#
      • 1...Rxd1
        • 2.Qe2#
      • 1...Rxh5
        • 2.Qb1#
        • 2.Qc2#
      • 1...Rg5
        • 2.Qb1#
        • 2.Qc2#
      • 1...Qc6
        • 2.Qe2#
      • 1...Rd3
        • 2.Qe6#
      • 1...Rd4
        • 2.Qe6#
        • 2.Qe2#
      • 1...Re5
        • 2.Qb1#
        • 2.Qc4#
        • 2.Qc2#
        • 2.Qe2#
      • 1...Rf5
        • 2.Qb1#
        • 2.Qc4#
        • 2.Qc2#
        • 2.Qe2#
      • 1...c4
        • 2.Qe2#
      • 1...e6
        • 2.Qe2#
      • 1...Rd2!
    • 1.Qg8?
      • threat
        • 2.Qxd5#
        • 2.Qg4#
      • 1...Qxb7
        • 2.Qg4#
      • 1...Rxd1
        • 2.Qxh7#
      • 1...Rxh5
        • 2.Qg4#
      • 1...Rd2
        • 2.Qxh7#
      • 1...Qc6
        • 2.Qg4#
      • 1...Qd7
        • 2.Qxd5#
      • 1...Qc8
        • 2.Qxd5#
      • 1...Rd3
        • 2.Qe6#
        • 2.Qxh7#
        • 2.Qg4#
      • 1...Rd4
        • 2.Qe6#
        • 2.Qxh7#
        • 2.Qg4#
      • 1...Re5
        • 2.Qc4#
        • 2.Qg4#
      • 1...Rf5
        • 2.Qc4#
      • 1...e6
        • 2.Qg4#
      • 1...Rg5!
  • Keys
    • 1.Qa3!
      • threat
        • 2.Re1#
        • 2.Qe3#
      • 1...Rxd1
        • 2.Qe3#
      • 1...Rxh5
        • 2.Qd3#
      • 1...Rg5
        • 2.Qd3#
      • 1...Rd2
        • 2.Qe3#
      • 1...Rd3
        • 2.Qxd3#
      • 1...Re5
        • 2.Qd3#
        • 2.Qe3#
      • 1...Rf5
        • 2.Qd3#
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(c);XR(A)::QAB(J)+S(I),DCHECK,XP(b)
    • R(c);P_PINP(B)::QAB(J)+S(I),DCHECK,XP(b)
    • R(c);P_PINP(E)::QAB(J)+S(I),DCHECK,XP(e)
    • R(c);XR(G)::QAB(J)+S(I),DCHECK,XP(e)
  • Tries
    • Try
      • S(I);CHECK,P_PINR(c),XP(b)
      • Vars
        • P(d);XS(I)::QAB1(J),XR(c)
        • P(e);XS(I)::QAB1(J),XR(c)
      • Refutation
        • Q(g);XS(I)
    • Try
      • S(I);CHECK,P_PINR(c),XP(e)
      • Vars
        • P(h);XS(I)::QAB1(J),XR(c)
      • Refutation
        • Q(g);XS(I)
    • Try
      • R(A);CHECK
      • Vars
        • R(c);XR(A)::QAB(J)+S(I),DCHECK,XP(b)
      • Refutation
        • P(b);XR(A)
    • Try
      • R(G);CHECK
      • Vars
        • R(c);XR(G)::QAB(J)+S(I),DCHECK,XP(e)
      • Refutation
        • P(e);XR(G)
    • Try
      • Q(J);
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);XS(I)::QAR2(J)
        • R(c);XR(A)::QAR2(J)
        • Q(g);::QAR2(J)
        • R(c);OGATE::QAR2(J)
        • P(b);::QAR2(J)
        • P(h);::QAR2(J)
      • Refutation
        • R(c);P_PINP(B)
    • Try
      • Q(J);
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);XS(I)::QAR2(J)
        • R(c);N_GUARD,XR(A)::QAB(J),XP(i)
        • R(c);XR(G)::QAR2(J)
        • R(c);N_GUARD,P_PINP(B)::QAB(J),XP(i)
        • Q(g);::QAR2(J)
        • Q(g);::QAB1(J),XR(c)
        • R(c);OGATE::QAR2(J)
        • P(h);::QAR2(J)
      • Refutation
        • R(c);P_PINP(E)
  • Actual
    • Q(J);
    • Threat
      • DUALS(2)
    • Vars
      • R(c);XR(A)::QAR1(J)
      • R(c);N_GUARD,XR(G)::QAB1(J)
      • R(c);N_GUARD,P_PINP(E)::QAB1(J)
      • R(c);P_PINP(B)::QAR1(J)
      • R(c);N_GUARD::QAB1(J),XR(c)
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