MESON Chess Problem Database

Problem Display
PID: 156001 (1b2NB2/1R4P1/8/1p1Pp3/PPk1N3/rb2r2p/1Q5K/1B1R4 w - - 0 1)

Stojnic, Dragan

The Problemist, 2014

1b2NB2/1R4P1/8/1p1Pp3/PPk1N3/rb2r2p/1Q5K/1B1R4

#2

12 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Qc3#
    • 1...Re2+
      • 2.Qxe2#
    • 1...Rc3
      • 2.Qxc3#
    • 1...Bc7
      • 2.Rxc7#
  • Tries
    • 1.Rxb5?
      • threat
        • 2.Sd2#
      • 1...Re2+
        • 2.Qxe2#
      • 1...Rxe4
        • 2.Bd3#
      • 1...Bxa4
        • 2.Rc5#
      • 1...Bc2
        • 2.Rc5#
      • 1...Rc3
        • 2.Qxc3#
      • 1...Rd3
        • 2.Bxd3#
      • 1...Rxa4!
    • 1.Qc1+?
      • 1...Rc3
        • 2.Qxc3#
      • 1...Bc2!
    • 1.Qc2+?
      • 1...Rc3
        • 2.Qxc3#
      • 1...Bxc2!
    • 1.Qe2+?
      • 1...Rd3
        • 2.Qxd3#
      • 1...Rxe2+!
    • 1.g8Q?
      • threat
        • 2.Sd2#
      • 1...Re2+
        • 2.Qxe2#
      • 1...Rxe4
        • 2.Bd3#
      • 1...Bc2
        • 2.d6#
      • 1...Rc3
        • 2.Qxc3#
      • 1...Rd3
        • 2.Bxd3#
      • 1...Bd6!
    • 1.g8B?
      • threat
        • 2.Sd2#
      • 1...Re2+
        • 2.Qxe2#
      • 1...Rxe4
        • 2.Bd3#
      • 1...Bc2
        • 2.d6#
      • 1...Rc3
        • 2.Qxc3#
      • 1...Rd3
        • 2.Bxd3#
      • 1...Bd6!
  • Keys
    • 1.Sc7!
      • threat
        • 2.Sd2#
      • 1...Re2+
        • 2.Qxe2#
      • 1...Rxe4
        • 2.Bd3#
      • 1...Bxc7
        • 2.Rxc7#
      • 1...Rc3
        • 2.Qxc3#
      • 1...Rd3
        • 2.Bxd3#
      • 1...Bc2
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(c);N_GUARD::QAR1(C)
    • R(c);CHECK,N_GUARD::QAB(C),XR(c)
    • R(c);N_GUARD::QAR1(C),XR(c)
    • B(h);N_GUARD::R(I),XB(h)
  • Tries
    • Try
      • R(I);XP(f)
      • Threat
        • S(G)
      • Vars
        • R(c);CHECK,N_GUARD::QAB(C),XR(c)
        • R(c);N_GUARD,XS(G)::B(A)
        • B(b);XP(E)::R1(I)
        • B(b);::R1(I)
        • R(c);N_GUARD::QAR1(C),XR(c)
        • R(c);N_GUARD::B(A),XR(c)
      • Refutation
        • R(a);XP(E)
    • Try
      • Q(C);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR1(C),XR(c)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • Q(C);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR1(C),XR(c)
      • Refutation
        • B(b);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAB1(C),XR(c)
      • Refutation
        • R(c);CHECK,XQ(C)
    • Try
      • P(J);
      • Threat
        • S(G)
      • Vars
        • R(c);CHECK,N_GUARD::QAB(C),XR(c)
        • R(c);N_GUARD,XS(G)::B(A)
        • B(b);::QAB(J)+P(H)
        • R(c);N_GUARD::QAR1(C),XR(c)
        • R(c);N_GUARD::B(A),XR(c)
      • Refutation
        • B(h);
    • Try
      • P(J);
      • Threat
        • S(G)
      • Vars
        • R(c);CHECK,N_GUARD::QAB(C),XR(c)
        • R(c);N_GUARD,XS(G)::B(A)
        • B(b);::B(J)+P(H)
        • R(c);N_GUARD::QAR1(C),XR(c)
        • R(c);N_GUARD::B(A),XR(c)
      • Refutation
        • B(h);
  • Actual
    • S(K);
    • Threat
      • S(G)
    • Vars
      • R(c);CHECK,N_GUARD::QAB(C),XR(c)
      • R(c);N_GUARD,XS(G)::B(A)
      • B(h);OGATE,XS(K)::R(I),XB(h)
      • R(c);N_GUARD::QAR1(C),XR(c)
      • R(c);N_GUARD::B(A),XR(c)
      • B(b);::S(G)
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