MESON Chess Problem Database

Problem Display
PID: 121324 (8/4p1K1/1pp1k3/2PR4/3prp2/3N2p1/Q6b/7b w - - 0 1)

Marik, Josef V

Jas, 1936

8/4p1K1/1pp1k3/2PR4/3prp2/3N2p1/Q6b/7b

#2

5 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Sxf4#
    • 1...Re2
      • 2.Sxf4#
    • 1...Re3
      • 2.Sxf4#
    • 1...bxc5
      • 2.Sxc5#
  • Tries
    • 1.Kg6?
      • threat
        • 2.Rxd4#
        • 2.Rd6#
        • 2.Rd8#
      • 1...bxc5
        • 2.Sxc5#
      • 1...Re1
        • 2.Sxf4#
        • 2.Rd6#
      • 1...Re2
        • 2.Sxf4#
        • 2.Rd6#
      • 1...Re3
        • 2.Sxf4#
        • 2.Rd6#
      • 1...Re5
        • 2.Sxf4#
        • 2.Rd6#
      • 1...cxd5!
    • 1.Qa7?
      • threat
        • 2.Qd7#
      • 1...Kxd5
        • 2.Qa2#
      • 1...cxd5!
    • 1.Qa8?
      • threat
        • 2.Qxc6#
        • 2.Qg8#
      • 1...Kxd5
        • 2.Qa2#
      • 1...cxd5
        • 2.Qc8#
      • 1...Re5!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Sxf4#
      • 1...Kxd5
        • 2.Qa2#
      • 1...cxd5
        • 2.Qg4#
      • 1...Re5
        • 2.Qxe5#
      • 1...g2
        • 2.Qxe4#
      • 1...f3
        • 2.Sf4#
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • R(e);N_GUARD::S(B),XP(f)
    • P(g);XP(C)::S(B),XP(g)
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Threat
        • DUALS(3)
      • Vars
        • P(g);XP(C)::S(B),XP(g)
      • Refutation
        • P(h);P_SPINP(h),XR(D)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(i);OGATEB,S_FLIGHT,XR(D)::QAB(A)
      • Refutation
        • P(h);XR(D)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(i);OGATEB,P_SPINP(h),S_FLIGHT,XR(D)::QAB(A)
        • P(h);SBLOCK,XR(D)::QAB(A)
      • Refutation
        • R(e);
  • Actual
    • Q(A);P_PINR(e)
    • Threat
      • S(B),XP(f)
    • Vars
      • K(i);N_SPINR(e),OGATEB,S_FLIGHT,XR(D)::QAB(A)
      • P(h);SBLOCK,XR(D)::QAB(A)
      • R(e);OGATE::QAR1(A),XR(e)
      • P(c);S_CUTB(a)::QAR2(A),XR(e)
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