MESON Chess Problem Database

Problem Display
PID: 11422 (4K3/8/3B1Q2/1pRpnp2/3k4/R3r1Nb/6p1/2Nr4 w - - 0 1)

Kniest, Peter

Schach-Echo, 1938

4K3/8/3B1Q2/1pRpnp2/3k4/R3r1Nb/6p1/2Nr4

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Re2
      • 2.Scxe2#
    • 1...Rxa3
      • 2.Qxe5#
    • 1...Rb3
      • 2.Qxe5#
    • 1...Rc3
      • 2.Qxe5#
    • 1...Rd3
      • 2.Qxe5#
    • 1...Rf3
      • 2.Sce2#
      • 2.Qxe5#
    • 1...Rxg3
      • 2.Qxe5#
  • Tries
    • 1.Rac3?
      • threat
        • 2.Sb3#
      • 1...Rxc3
        • 2.Qxe5#
      • 1...Rxg3
        • 2.Qxe5#
      • 1...Red3
        • 2.Qxe5#
      • 1...Rxc1!
    • 1.Rd3+?
      • 1...Rexd3
        • 2.Qxe5#
      • 1...Rdxd3!
    • 1.Ra4+?
      • 1...b4
        • 2.Rxb4#
      • 1...bxa4!
    • 1.Rc2?
      • threat
        • 2.Bc5#
      • 1...Rxg3
        • 2.Qxe5#
      • 1...Rc3!
    • 1.Rcc3?
      • threat
        • 2.Bc5#
      • 1...Rxg3
        • 2.Qxe5#
      • 1...Rxc3!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Qxd5#
      • 1...Rxa3
        • 2.Qxe5#
      • 1...Rb3
        • 2.Qxe5#
      • 1...Rc3
        • 2.Qxe5#
      • 1...Red3
        • 2.Qxe5#
      • 1...Sd3
        • 2.Sb3#
      • 1...Sf3
        • 2.Qxe3#
      • 1...Sc4
        • 2.Rxd5#
      • 1...Sg4
        • 2.Sxf5#
      • 1...Sc6
        • 2.Qxe3#
      • 1...Sg6
        • 2.Qxe3#
      • 1...Sd7
        • 2.Qxe3#
      • 1...Sf7
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 2
  • Sets
    • R(c);N_GUARD::S(A),XR(c)
    • R(c);N_GUARD,XR(B)::QAB1(F),XS(h)
    • R(c);N_GUARD::QAB1(F),XS(h)
    • R(c);N_GUARD,XS(C)::QAB1(F),XS(h)
  • Tries
    • Try
      • R(B);
      • Threat
        • S(A)
      • Vars
        • R(c);N_GUARD,XR(B)::QAB1(F),XS(h)
        • R(c);N_GUARD,XS(C)::QAB1(F),XS(h)
        • R(c);N_GUARD::QAB1(F),XS(h)
      • Refutation
        • R(a);XS(A)
    • Try
      • R(B);CHECK
      • Vars
        • R(c);XR(B)::QAB1(F),XS(h)
      • Refutation
        • R(a);XR(B)
    • Try
      • R(B);CHECK
      • Vars
        • P(f);P_SPINP(f)::R(B),XP(f)
      • Refutation
        • P(f);XR(B)
    • Try
      • R(D);
      • Threat
        • B(E)
      • Vars
        • R(c);N_GUARD,XS(C)::QAB1(F),XS(h)
      • Refutation
        • R(c);
    • Try
      • R(D);
      • Threat
        • B(E)
      • Vars
        • R(c);N_GUARD,XS(C)::QAB1(F),XS(h)
      • Refutation
        • R(c);XR(D)
  • Actual
    • Q(F);N_PINS(h)
    • Threat
      • QAR1(F),XP(g)
    • Vars
      • R(c);N_GUARD,XR(B)::QAB1(F),XS(h)
      • R(c);N_GUARD::QAB1(F),XS(h)
      • S(h);P_PINQ(F),SBLOCK,S_CUTR(c)::S(A)
      • S(h);OGATE,P_PINQ(F)::QAB1(F),XR(c)
      • S(h);P_PINQ(F),SBLOCK::R1(D),XP(g)
      • S(h);P_PINQ(F),S_CUTB(d)::S(C),XP(i)
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