MESON Chess Problem Database

Problem Display
PID: 213215 (5b2/Q2p1K1n/5N2/1bRp1k1N/3Pp2P/1q1pP3/2Pr2R1/5n2 w - - 0 1)

Nemmer, Max F

Land og Folk, 1968

5b2/Q2p1K1n/5N2/1bRp1k1N/3Pp2P/1q1pP3/2Pr2R1/5n2

#2

10 + 11

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc2
      • 2.Rxd5#
    • 1...Qa4
      • 2.Rxd5#
    • 1...Qb1
      • 2.Rxd5#
    • 1...Qb2
      • 2.Rxd5#
    • 1...Qa3
      • 2.Rxd5#
    • 1...Qc3
      • 2.Rxd5#
    • 1...Qb4
      • 2.Rxd5#
    • 1...Rd1
      • 2.Rf2#
    • 1...Rf2
      • 2.Rxf2#
    • 1...Bc4
      • 2.Qxd7#
    • 1...Ba6
      • 2.Qxd7#
    • 1...Bxc5
      • 2.Sg7#
    • 1...Bd6
      • 2.Sg7#
    • 1...Be7
      • 2.Sg7#
    • 1...Bg7
      • 2.Sxg7#
    • 1...Sh2
      • 2.Sg3#
    • 1...Sg3
      • 2.Sxg3#
    • 1...Sg5+
      • 2.Rxg5#
    • 1...Sxf6
      • 2.Rg5#
  • Tries
    • 1.Rxb5?
      • threat
        • 2.Qxd7#
      • 1...Sg5+
        • 2.Rxg5#
      • 1...Sxf6
        • 2.Rg5#
      • 1...d6
        • 2.Qd7#
      • 1...Qxb5!
    • 1.Rc6?
      • threat
        • 2.Qxd7#
      • 1...Sg5+
        • 2.Rxg5#
      • 1...Sxf6
        • 2.Rg5#
        • 2.Rxf6#
      • 1...dxc6
        • 2.Qd7#
      • 1...d6
        • 2.Qd7#
      • 1...Bxc6!
    • 1.Qb8?
      • threat
        • 2.Qf4#
        • 2.Qe5#
      • 1...Sg5+
        • 2.Rxg5#
      • 1...Rf2
        • 2.Rxf2#
        • 2.Qe5#
      • 1...Bd6
        • 2.Sg7#
      • 1...Bh6
        • 2.Qe5#
      • 1...d6!
    • 1.Qc7?
      • threat
        • 2.Qf4#
        • 2.Qe5#
      • 1...Sg5+
        • 2.Rxg5#
      • 1...Rf2
        • 2.Rxf2#
        • 2.Qe5#
      • 1...Bd6
        • 2.Sg7#
      • 1...Bh6
        • 2.Qe5#
      • 1...d6!
  • Keys
    • 1.cxd3!
      • threat
        • 2.dxe4#
      • 1...Sg5+
        • 2.Rxg5#
      • 1...Qxd3
        • 2.Rxd5#
      • 1...Rxd3
        • 2.Rf2#
      • 1...Bxd3
        • 2.Qxd7#
      • 1...Bxc5
        • 2.Sg7#
      • 1...Sxf6
        • 2.Rg5#
      • 1...exd3
        • 2.e4#
      • 1...Qc2
        • 2.Rxd5#
      • 1...Qb1
        • 2.Rxd5#
      • 1...Sg3
        • 2.Sxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 13
  • Sets
    • Q(c);N_GUARD,XP(A)::R(F),XP(g)
    • Q(c);N_GUARD::R(F),XP(g)
    • R(b);N_GUARD::R(B)
    • R(b);N_GUARD::R(B),XR(b)
    • B(f);N_GUARD::QAB(I),XP(i)
    • B(k);N_GUARD,N_SPINP(g),XR(F)::S(G)
    • B(k);N_GUARD::S(G)
    • B(k);N_GUARD::S(G),XB(k)
    • S(a);N_GUARD::S(G)
    • S(a);N_GUARD::S(G),XS(a)
    • S(j);CHECK,N_GUARD::R1(B),XS(j)
    • S(j);N_GUARD,XS(H)::R1(B)
  • Tries
    • Try
      • R(F);XB(f)
      • Threat
        • QAB(I),XP(i)
      • Vars
        • S(j);CHECK,N_GUARD::R1(B),XS(j)
        • S(j);N_GUARD,XS(H)::R1(B)
        • P(i);::QAB(I)
      • Refutation
        • Q(c);N_SPINP(g),XR(F)
    • Try
      • R(F);N_PINP(g)
      • Threat
        • QAB(I),XP(i)
      • Vars
        • S(j);CHECK,N_GUARD::R1(B),XS(j)
        • P(i);XR(F)::QAB(I)
        • P(i);::QAB(I)
      • Refutation
        • B(f);XR(F)
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • S(j);CHECK,N_GUARD::R1(B),XS(j)
        • B(k);N_GUARD::S(G)
        • B(k);::QAR1(I)
      • Refutation
        • P(i);
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • S(j);CHECK,N_GUARD::R1(B),XS(j)
        • B(k);N_GUARD::S(G)
        • B(k);::QAR1(I)
      • Refutation
        • P(i);
  • Actual
    • P(A);XP(d)
    • Threat
      • P(A),XP(e)
    • Vars
      • S(j);CHECK,N_GUARD::R1(B),XS(j)
      • Q(c);N_GUARD,XP(A)::R(F),XP(g)
      • R(b);N_GUARD,XP(A)::R(B)
      • B(f);N_GUARD,XP(A)::QAB(I),XP(i)
      • B(k);N_GUARD,N_SPINP(g),XR(F)::S(G)
      • S(j);N_GUARD,XS(H)::R1(B)
      • P(e);OGATE,XP(A)::P(C)
      • Q(c);N_GUARD::R(F),XP(g)
      • S(a);N_GUARD::S(G),XS(a)
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