MESON Chess Problem Database

Problem Display
PID: 135484 (3r1N2/2P1Bb2/3PPQ1p/2Kp1P1q/1pP2k2/1r1B2Rp/2n2PR1/4N3 w - - 0 1)

Niestroj, Georg

Troll, 2009

3r1N2/2P1Bb2/3PPQ1p/2Kp1P1q/1pP2k2/1r1B2Rp/2n2PR1/4N3

#2

14 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3
      • 2.Rxf3#
    • 1...Qg4
      • 2.Rxg4#
    • 1...Qg6
      • 2.Rf3#
      • 2.fxg6#
    • 1...Qh4
      • 2.Rf3#
    • 1...Qxf5
      • 2.Rf3#
      • 2.Rg4#
      • 2.Qxf5#
    • 1...Qg5
      • 2.Rf3#
    • 1...Rxd6
      • 2.Bxd6#
    • 1...Bxe6
      • 2.Sxe6#
    • 1...Sa1
      • 2.Qd4#
    • 1...Sxe1
      • 2.Qd4#
    • 1...Sa3
      • 2.Qd4#
    • 1...Se3
      • 2.Qd4#
      • 2.fxe3#
    • 1...Sd4
      • 2.Qxd4#
    • 1...hxg2
      • 2.Sxg2#
  • Tries
    • 1.Sf3?
      • threat
        • 2.Qe5#
      • 1...Qxf5
        • 2.Qxf5#
      • 1...Qxf3!
    • 1.Sg6+?
      • 1...Qxg6
        • 2.Rf3#
        • 2.fxg6#
      • 1...Bxg6!
    • 1.Sd7?
      • threat
        • 2.Qe5#
      • 1...Qxf5
        • 2.Rf3#
        • 2.Rg4#
        • 2.Qxf5#
      • 1...Qe2
        • 2.Qxh6#
      • 1...Rxd7!
    • 1.Re3?
      • threat
        • 2.Qe5#
      • 1...Qxf5
        • 2.Rf3#
        • 2.Qxf5#
      • 1...Sxe3
        • 2.Qd4#
      • 1...hxg2!
  • Keys
    • 1.Kxd5!
      • threat
        • 2.Qe5#
      • 1...Qf3+
        • 2.Rxf3#
      • 1...Qxf5+
        • 2.Qxf5#
      • 1...Rxd3+
        • 2.Sxd3#
      • 1...Rxd6+
        • 2.Bxd6#
      • 1...Bxe6+
        • 2.Sxe6#
      • 1...Se3+
        • 2.fxe3#
      • 1...Qe2
        • 2.Qxh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • Q(g);N_GUARD::R1(E),XQ(g)
    • Q(g);N_GUARD::R1(E)
    • R(j);OGATE,XP(I)::B(M),XR(j)
    • B(i);XP(J)::S(N),XB(i)
    • S(a);N_GUARD::QAR2(K)
    • S(a);N_GUARD,XS(A)::QAR2(K)
    • S(a);N_GUARD::QAR2(K),XS(a)
    • P(c);XR(C)::S(A),XP(c)
  • Tries
    • Try
      • S(A);
      • Threat
        • QAB1(K)
      • Vars
        • Q(g);OGATE,P_SPINQ(g),XP(H)::QAR1(K),XQ(g)
      • Refutation
        • Q(g);XS(A)
    • Try
      • S(N);CHECK
      • Refutation
        • B(i);XS(N)
    • Try
      • S(N);
      • Threat
        • QAB1(K)
      • Vars
        • Q(g);N_GUARD::QAB(K),XP(h)
      • Refutation
        • R(j);XS(N)
    • Try
      • R(E);
      • Threat
        • QAB1(K)
      • Vars
        • S(a);N_GUARD,XR(E)::QAR2(K)
      • Refutation
        • P(c);XR(C)
  • Actual
    • K(G);P-FLIGHT,P_SPINP(H),XP(f)
    • Threat
      • QAB1(K)
    • Vars
      • Q(g);CHECK,N_GUARD,N_PINP(H),P_PINP(I)::R1(E),XQ(g)
      • Q(g);CHECK,OGATE,P_PINP(I),P_SPINQ(g),XP(H)::QAR1(K),XQ(g)
      • R(b);CHECK,XB(D)::S(A),XR(b)
      • R(j);CHECK,OGATE,XP(I)::B(M),XR(j)
      • B(i);CHECK,XP(J)::S(N),XB(i)
      • S(a);CHECK,OGATE::P(B),XS(a)
      • Q(g);N_GUARD,N_PINP(H),P_PINP(I)::QAB(K),XP(h)
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