MESON Chess Problem Database

Problem Display
PID: 227487 (8/2K5/k2p4/1R1P4/8/2N5/8/8 w - - 0 1)

Schlarko, Iosif

Magyar Sakkvilag, 1926

8/2K5/k2p4/1R1P4/8/2N5/8/8

#2

4 + 2

6490 yacpdb 2020
5454 Near Snap 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Ka7
      • 2.Ra5#
  • Tries
    • 1.Sb1?
      • 1...Ka7
        • 2.Ra5#
      • 1...Kxb5!
    • 1.Sd1?
      • 1...Ka7
        • 2.Ra5#
      • 1...Kxb5!
    • 1.Sa2?
      • 1...Ka7
        • 2.Ra5#
      • 1...Kxb5!
    • 1.Se2?
      • 1...Ka7
        • 2.Ra5#
      • 1...Kxb5!
    • 1.Sa4?
      • 1...Ka7
        • 2.Ra5#
      • 1...Kxb5!
    • 1.Se4?
      • 1...Ka7
        • 2.Ra5#
      • 1...Kxb5!
    • 1.Rb1?
      • threat
        • 2.Ra1#
      • 1...Ka7
        • 2.Ra1#
      • 1...Ka5!
    • 1.Rb2?
      • threat
        • 2.Ra2#
      • 1...Ka7
        • 2.Ra2#
      • 1...Ka5!
    • 1.Rb3?
      • threat
        • 2.Ra3#
      • 1...Ka7
        • 2.Ra3#
      • 1...Ka5!
    • 1.Rc5?
      • 1...Ka7
        • 2.Ra5#
      • 1...dxc5!
  • Keys
    • 1.Rb4!
      • threat
        • 2.Ra4#
      • 1...Ka5
        • 2.Ra4#
      • 1...Ka7
        • 2.Ra4#

Anticipated by 203224(1924)

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::R(B)
  • Tries
    • Try
      • S(A);
      • Vars
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • S(A);
      • Vars
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • S(A);
      • Vars
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • S(A);
      • Vars
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • S(A);
      • Vars
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • S(A);
      • Vars
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • R(B);
      • Threat
        • R(B)
      • Vars
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(B);
      • Threat
        • R(B)
      • Vars
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(B);
      • Threat
        • R(B)
      • Vars
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(B);
      • Vars
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • P(b);XR(B)
  • Actual
    • R(B);
    • Threat
      • R(B)
    • Vars
      • K(a);P-FLIGHT::R1(B)
      • K(a);P-FLIGHT::R(B)
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